=D.= ATLANTIS.—The story of Atlantis rests solely upon the authority of Plato, who sketched it in the _Timaeus_, and began an elaborated version in the _Critias_ (if that fragment be by him), which old writers often cite as the _Atlanticus_. This is frequently forgotten by those who try to establish the truth of the story, who often write as if all statements in print were equally available as “authorities,” and quote as corroborations of the tale all mentions of it made by classical writers, regardless of the fact that all are later than Plato, and can no more than Ignatius Donnelly corroborate him. In fact, the ancients knew no better than we what to make of the story, and diverse opinions prevailed then as now. Many of these opinions are collected by Proclus in the first book of his commentary on the _Timaeus_,[386] and all shades of opinion are represented from those who, like Crantor, accepted the story as simply historical, to those who regarded it as a mere fable. Still others, with Proclus himself, accepted it as a record of actual events, while accounting for its introduction in Plato by a variety of subtile metaphysical interpretations. Proclus reports that Crantor, the first commentator upon Plato (_circa_ B.C. 300), asserted that the Egyptian priests said that the story was written on pillars which were still preserved,[387] and he likewise quotes from the _Ethiopic History_ of Marcellus, a writer of whom nothing else is known, a statement that according to certain historians there were seven islands in the external sea sacred to Proserpine; and also three others of great size, one sacred to Pluto, one to Ammon, and another, the middle one, a thousand stadia in size, sacred to Neptune. The inhabitants of it preserved the remembrance, from their ancestors, of the Atlantic island which existed there, and was truly prodigiously great, which for many periods had dominion over all the islands in the Atlantic sea, and was itself sacred to Neptune.[388] Testimony like this is of little value in such a case. What comes to us at third hand is more apt to need support than give it; yet these two passages are the strongest evidence of knowledge of Atlantis outside of Plato that is preserved. We do indeed find mention of it elsewhere and earlier. Thus Strabo[389] says that Posidonius (B.C. 135-51) suggested that, as the land was known to have changed in elevation, Atlantis might not be a fiction, but that such an island-continent might actually have existed and disappeared. Pliny[390] also mentions Atlantis in treating of changes in the earth’s surface, though he qualifies his quotation with “si Platoni credimus.”[391] A mention of the story in a similar connection is made by Ammianus Marcellinus.[392]