Antonio Usai (1957- ) was born in Assemini, 12 km northwest of Cagliari, the capital of Sardinia. Having a passion for ancient history, he has written a number of papers(a) locating the Pillars of Heracles within the Mediterranean. An English translation of The Pillars of Hercules in Aristotle’s Ecumene is now available on the excellent Academia.edu website as well as a 67-page booklet. Included in his work is a critique(b) of Sergio Frau’s book.
Usai followed a reading of Frau’s book with a study of the works of Herodotus, Aristotle, Polybius and Strabo among others. He was drawn to the story of Hanno’s voyage, where Hanno is described as leaving Carthage, turning east, then passing through the ‘Pillars’ and following the coast south towards Syrtis Minor, which is described as being on their right.
According to Usai, this would only make sense if the Pillars had been situated between the east coast of Tunisia and the islands of Kerkennah. Furthermore, Usai contends that part of Hanno’s report of his voyage was a hoax!
Finally, after devoting most of his essays to identifying the original Pillars at Kerkennah, he concludes his work by identifying Greenland as the location of Atlantis.
A number of translations of the Periplus (Sea Voyage Guide) of Hanno are available on the internet(d).
(d) https://books.google.com.mt/books?id=qbMBAAAAYAAJ&printsec=frontcover&dq=voyage+of+Hanno&source=bl &ots=jLnRCZPPxG&sig=bQJ3BSMQg8oYS0QY5FJ90bRJIhQ&hl=mt&ei=–tuS4fNEIaqnAOo_NjHBA&sa=X&oi=book_result&ct=result&resnum=3&ved=0CBgQ6AEwAg#v=onepage&q&f=true