J. Manson Valentine (1902-1994), together with divers Jacques Mayol, Harold Climo and Robert Angove, discovered the so-called “Bimini Wall” in 1968. It appears that Valentine saw his discovery as a confirmation of Edgar Cayce’s Atlantis prediction. During earlier explorations off Gonova Island near the coast of Haiti, in 1966, he discovered ‘sophisticated artefacts of possible Atlantean origin’ in ten feet of water.
It is worth noting that Lynn Picknett & Clive Prnce have pointed out[0705.61] that the Bimini Road was known to the local islanders for years and even offered to show it to its ‘discoverers’! If true, the date of the find could have been manipulated to coincide with Cayce’s ‘prognostication’.
Brad Steiger records that Valentine expressed the view that Atlantis was technologically more advanced than we are today! If so I find it strange that although Athens defeated such a highly developed Atlantis, it did so without leaving any evidence of it being an equally advanced society!
Dr. Valentine also collaborated with Charles Berlitz in the writing of his best-seller, The Bermuda Triangle and its sequel Without a Trace. He was a consultant on the production of a 1979 documentary also titled The Bermuda Triangle.
Dr. Valentine died of complications following a bite from a venomous recluse spider.
Atlantis: The Autobiography of a Search  two young writers Robert Ferro and his partner Michael Grumley. Most of their output was fiction but they collaborated on this non-fiction book in the late 1960’s. Unfortunately, it does little to advance the search for Atlantis. Apparently, inspired by the writings of Edgar Cayce they descended on Bimini in 1968 and began exploring the shallow seas there and where they encountered Dr. Manson Valentine one of the discoverers of the Bimini Road. However, their lack of scientific background allows them to declare that many of the rocks there were not local but quarried in the far-off Andes. The book contains a defence of pot-smoking which is probably more interesting than their grasp of the Atlantis mystery.
Sadly, Michael Grumley died of AIDS in 1988 and Robert Ferro died similarly less than three months later.