Decades ago, I read a book (written, I think, around 1890) about Atlantis. 99% of the evidence it gave was, of course, bogus. But the one piece that seemed re

Decades ago, I read a book (written, I think, around 1890) about Atlantis. 99% of the evidence it gave was, of course, bogus. But the one piece that seemed reasonable was an account of depth soundings by the SS Great Eastern when it laid the second cable across the Atlantic in 1866. I haven't seen a recent account of those soundings, but the chart in the book did show the Atlantic to be shallower in the middle--which the author took to be the sunken continent of Atlantis. Of course, now we know that the shallower depths there are the Mid-Atlantic ridge, which was never above water (except up at Iceland).