Bramwell was mistaken, referring to a land-under-the-waves (Tir fo thuinn) which is a term sometimes applied to Hy-Brasil a mythical sunken land to the west of Ireland.
Cartography is defined by The International Cartographic Association “as the discipline dealing with the conception, production, dissemination and study of maps.” The earliest land maps can be traced back to Babylonia around 1400 BC. In 2017, Evangelos Livieratos, Professor Emeritus of the Aristotelian University of Thessaloniki Cartography Department, offered evidence that the ancient Greeks were the first to develop a primitive GPS system, using the stars and their relationship with the earth’s surface(g).
The BBC offered an overview on the development of cartography since the 15th century(k).
The subject entered the Atlantis arena in 1665 with the publication of a speculative map(a) of Atlantis, situated in the Atlantic, by Athanasius Kircher. It was allegedly based on earlier Egyptian maps, but unfortunately there has been no corroborative evidence to support this contention. Kircher’s map had been used to bolster a variety of location theories – Azores, Russia, Baffin Bay and Greenland, Kircher himself favoured the Azores.
Hy-Brasil was reputed to be an island to the west of Ireland and frequently associated with the story of Atlantis. The Genoese cartographer, Angellino de Dalorto (fl.1339), placed Hy-Brasil on a map as early as 1325. It is further claimed that Dalorto, sometimes known as Angelino Dulcert, also depicted Australia on his 1339 portolan chart(l).
However, on some 15th century maps, the islands of the Azores appear as Isola de Brazil, or Insulla de Brazil. Apparently, it was not until as late as 1865 that Hy-Brasil was finally removed from official naval charts.
Another feature on ancient that can confuse is the placing of south at the top of old charts, two examples of which are Kircher’s map of Atlantis and Al-Idrisi’s Tabula Rogeriana. Caroline Williams has an interesting article(e) on the BBC website relating to the history of map orientation.
The unreliability of early maps is highlighted by the manner in which California has been depicted. In the 16th century the maps of both Mercator and Ortelius correctly show Baja California as a peninsula, but in the following 17th and 18th centuries it became an island on many charts despite written evidence to the contrary. There is a website dedicated to a study of the ‘island of California’(I), which incongruously ends with a brief reference to Atlantis, placing it in the Atlantic in the Region of Bermuda.
Donald S. Johnson in his well illustrated Phantom Islands of the Atlantic discusses in detail the history of seven legendary islands. This fascinating book offers every reason to treat the details of early cartography with extreme caution.
Further difficulties with old cartography are the result of early mapmakers having a dread of blank spaces, a view outlined in a recent (Nov. 2017) National Geographic online article(h).
The most widely referred to map in relation to Atlantis as well as advanced ancient civilisations is the Piri Reis chart. This arguably depicts an ice-free Antarctica and has been used to develop the idea that Atlantis had been located there and was destroyed when a sudden pole shift caused the southern icecap to move to its present position. Rose and Rand Flem-Ath are the leading proponents of this idea based on the findings of Charles Hapgood. Other maps such as that of Phillipe Buache, the renowned French geographer, published in 1737, are claimed to show an ice-free Antarctica.
It is claimed by Ivan Petricevic that The Ben Zara Map of 1487 “displays remnants of glaciers in Britain, but also extremely detailed depictions of islands in the Mediterranean and Aegean seas. Today, these islands still exist, but due to rising water levels, these are now underwater.”(j)
Dale Drinnon had an interesting, if speculative, article on ancient maps and their possible relevance to the story of Atlantis(b). Another article in Atlantis Rising magazine (July/August 2014) argues that the quality of medieval navigational charts (portolans) of the Mediterranean exceeded the capabilities of the instruments and knowledge in the region at that time and must have originated elsewhere. However, Roel Nicolai at Holland’s Utrecht University, who expressed these sentiments, was unwilling to nominate Atlantis as the source of the maps(c).
*When asked in a recent interview what he meant by ‘advanced civilisationGraham Hancock revealed(u) that “I think we’re talking about a civilization – more than 12,000 years ago – which was as advanced as our civilization was, say in the late 18th century or early 19th century. In other words, they could navigate the world, they could explore the world, they could measure the world accurately, they had precise astronomy, they could create beautiful maps that were accurate in terms of latitude and longitude. That kind of level of civilization.”*
Enrique García Barthe is an Argentinian cartographer who has an interesting Spanish/English website(d) dealing with pre-Columbian maps. Although many people have heard of the Piri Reis Map and the controversy surrounding it, García Barthe introduces a lot of new maps that appear to complement Piri Reis.
In 2015, Melissa Brooks used the data in the Atlantipedia chronology of location theories to develop a map(f) showing the distribution and level of support for the various theories on offer.
(b) See: Archive 3591
Hi–Brasil or Hy–Brasil is sometimes referred to as the Irish Atlantis and is a name given to a legendary island to the west of Ireland. It is frequently referred to as the Fortunate Island, which has obvious resonances with the Hesperides. Another appellation in Irish is Tir fo-Thuin or Land under the Wave. A further explanation offered for the origin of the name is that it is derived from an ancient term ‘brazil’that refers to the source of a rare dye, which is reminiscent of the expensive purple dye extracted from the Murex snail, traded by the Phoenicians.
One theory is that in the dim and distant past a part of what is now known as the Porcupine Bank, just west of Ireland, was exposed when the sea levels were lower as a result of the last Ice Age. When the feature was submerged by the rising seas it was probably eroded further by the ocean currents. The claim is that a memory of the exposed land lingered in the folk memory of the inhabitants of the west coast of Ireland.
The Genoese cartographer, Angellino de Dalorto (fl.1339), placed Hy-Brasil west of Ireland on a map as early as 1325. However, on some 15th century maps, the islands of the Azores appear as Isola de Brazil, or Insulla de Brazil. Apparently, it was not until as late as 1865 that Hy-Brasil was finally removed from official naval charts. Also found on medieval maps was another mystery island south of Brasil, sometimes appearing as Mayda, Asmaidas or Brazir(d).
Phantom islands have been shown on maps for hundreds of years and some as recently as the 20th century(f).
One of the most famous visits to Hy-Brasil was in 1674 by Captain John Nisbet of Killybegs, Co. Donegal, Ireland. He and his crew were in familiar waters west of Ireland, when a fog came up. As the fog lifted, the ship was dangerously close to rocks. While getting their bearings, the ship anchored in three fathoms of water, and four crew members rowed ashore to visit Hy-Brasil. They spent a day on the island and returned with silver and gold given to them by an old man who lived there. Upon the return of the crew to Ireland, a second ship set out under the command of Alexander Johnson. They, too, found the hospitable island of Hy-Brasil and returned to Ireland to confirm the tales of Captain Nisbet and crew.
The last documented sighting of Hy-Brasil was in 1872, when author T. J. Westropp and several companions saw the island appear and then vanish. This was Westropp’s third view of Hy-Brasil, but on this voyage he had brought his mother and some friends to verify its existence.
The Irish historian, W.G.Wood-Martin, also wrote[388.1.212] about Hi-Brazil over a hundred years ago.
Donald S. Johnson has also written an illustrated and more extensive account of the ‘history’ of Hi-Brazil in chapter six of his Phantom Islands of the Atlantic.
A modern twist on the story arose in connection with the Rendelsham UFO(b) mystery/hoax(c) of 1980, when co-ordinates that correspond to one of the Hy-Brasil locations was allegedly conveyed to one Sgt. Jim Penniston who kept it secret for thirty years(a)!
In 2010, the September 11th edition of the London Daily Mail (and its sister paper, the Irish Daily Mail) they ran an article with the adventurous headline of “The Atlantis of Connemara” that included the accounts of 20th century witnesses to unexplained visions off the west coast of Galway. Included was a potted history of recorded sightings since 1460.
In 2013 Barbara Freitag published a valuable in-depth study of Hy-Brasil dealing with its cartography, history and mythology.
Brazil has had few serious investigators propose it as the location of Atlantis. Although, in 1947 Harold T. Wilkins claimed[0363.97] that Quetzalcoatl was from Atlantean Brazil. Earlier in the 20th century, Col. P.H. Fawcett, the famous explorer, disappeared while searching in the Brazilian rain forest for a ‘lost city’ that he called ‘Z’. A 2009 book by David Grann about Fawcett’s searches in Brazil, entitled The Lost City of Z  was the basis for a film released in 2016. Sprague de Camp listed[0194.329] a George Lynch supporting a Brazilian Atlantis in 1925. In fact, Lynch was a fund-raiser for Fawcett.
However, although there is growing evidence of ancient roads, plazas and bridges in Brazil’s vast tropical forests, further data is needed before we can attempt to fit these structures into any specific culture or chronology.
An article(e) in the August 2017 of Antiquity offers evidence that humans lived in Brazil more than 20,000 years ago, which is many millennia before the Clovis people arrived in North America.
The possibility of Phoenician contact with Brazil has a number of supporters and a range of websites supports this controversial view(a). One such advocate, Ronald Barney, maintains that they concentrated their influence in the northeastern region of the country citing the work of Ludwig Schwennhagen and Apollinaire Frot(f).*There would appear to be evidence for 3rd century AD Roman contact with Brazil(h).*
May 2013 saw a flurry of media interest when a Japanese submersible found evidence in the form of granite suggesting of a previously unknown continental mass that sank about 900 miles off the coast of Rio de Janeiro. Members of the expedition have played down any attempt to link this discovery with Atlantis(b)(c).
This reminiscent of the reaction in 1931 when two islands were reported to have emerged from the sea off Brazil and within a short time, claims that they were a returning Atlantis were widely quoted(d).
Any suggestion that the land of Hy-Brasil in Irish mythology has any connection with Brazil or Atlantis is just wild speculation.
(g) See: Archive 3480
Ireland according to James Bramwell [0195.181], was first identified with Atlantis as early as circa 1250 AD in the Speculum Regale (The King’s Mirror)(g) which was written in Norway. Apart from that, Ireland was less controversially was first suggested in the 18th century as a possible location of Atlantis by the English geologist John Whitehurst. The idea lay dormant for over a century until the early part of the 20th century when George H. Cooper  suggested that Cork harbour fits Plato’s description of the harbour of Atlantis. Fifty years later an official guidebook claimed that one of the outposts of Atlantis was to be found on the west coast of Galway. As a nation famed for its storytelling we have never let truth stand in the way of a good tale.
The mythical Hy-Brasil was shown west of Ireland on maps as early as 1325 and incredibly, was not removed from naval charts until 1865. The UK’s Daily Star (21/5/16) with typical tabloid accuracy told its readers(f) that Hy-Brasil was off the coast of ‘Britain’!
In 1976, Steiner Books, New York, republished a book under the misleading title of Atlantis in Ireland. One may be excused for viewing this as a blatant case of exploitative opportunistic publishing. The original text was written by Henry O’Brien and published in London (1834) as The Round Towers of Ireland. Apart from being written in the rather turgid English of the period, there is not a single reference to Plato or Atlantis to be found in that volume.
Diodorus Siculus, in a well-known passage (Bk 1.158), that is claimed by some as a reference to Ireland(h), describes it as ”an island in the ocean over against Gaul, to the north, and not inferior in size to Sicily, the soil of which is so fruitful that they mow there twice in the year.” Some consider this to be reminiscent of the Platonic reference to the two crops a year gathered in Atlantis. However, I am more inclined to think that Diodorus was referring to Britain. Diodorus also mentions the Irish singular temples of ’round form’, however, this seems too early to be a reference to the round towers and more likely to be an allusion to the astronomically aligned mounds such as Newgrange, Dowth and Knowth in Ireland or Stonehenge in Britain!
In 1923, Conor MacDari, who’s eccentricity was comparable with that of Comyns Beaumont, published Irish Wisdom Preserved in the Bible and Pyramids , which among a litany of bizarre claims, proposed that Atlantis had been located in Ireland.
When Ignatius Donnelly came to the subject of Ireland, he attributed an Atlantean origin to so the various waves of settlers that came to the post-glacial island. He substitutes evidence with assertion and speculation. Donnelly further claimed that the famous round towers of Ireland are proof that the people of Atlantis settled in Ireland.
More recently Ulf Erlingsson, a Swedish geographer, insisted that with a claimed probability
factor of 99.98%, that his interpretation of Plato’s text demonstrates that Ireland was home to Atlantis . The subtitle of the book, Mappingthe Fairy Land, is probably a good guide on how seriously to take this book, particularly as it is by an author who hails from the land of the original Trolls.
In March 2008, it was reported that a Dr. Jac Hummer had mounted an expedition to South America with the intention of discovering the remains of St. Patrick under a pyramid there. But it gets better – he then explains that such a discovery will prove his theory that Ireland is Plato’s lost island of Atlantis!
Irish legend speaks of the Domnu, people of the deep sea from a land that disappeared beneath the waves. However, Ireland is still above the waves and in contrast to Plato’s statement that even in his time the location of Atlantis was marked by impassable shallows. Since sea levels have generally risen only slightly since Plato lived, he cannot have been referring to Ireland.
John Douglas Singer in his slender book, Ireland’s Mysterious Lands and Sunken Cities , has carried out an investigation into the ancient legends of Ireland and their possible connection with Plato’s Atlantis. He points out that Ireland has the greatest number of legends relating to sunken cities and islands! He draws on the works of Egerton Sykes and Lewis Spence among others.
Ireland was also nominated by Thomas Dietrich as an early colony of Atlantis in The Origin of Culture.
Somewhat incongruously, the website of extremist, Dejan Lucic, has an extensive and fully referenced article entitled The Irish Origins of Civilisation(a), including not a few controversial sources such as, Comyns Beaumont, Ralph Ellis and John Gordon.
Around 2010, a father and son team Francis J.Ward & Francis P.Ward seeminglly published their first book The Truth Against the World-Red Phoenix Rising & the Return of the Thunder Gods , in which they express the view that “Atlantis was a global, maritime empire based in Ireland”.(c)
In 2013, Skender Hushi informed the world that Albanian had been the original language of Ireland and Atlantis! Another equally odd claim came from Zoltán Simon who proposed that the ancient Hun Calendar came from Ireland [0549.147]!
Evidence for the earliest humans in Ireland is now dated as 10,500 BC.(d)(e)
*(a) See: http://atlantipedia.ie/samples/archive-2159/*