John Francis Arundell of Wardour (1831-1906) published The Secret of Plato’s Atlantis in 1885 as a rebuttal of Ignatius Donnelly’s groundbreaking book of three years earlier. The content of Arundell’s volume is now as dated as Donnelly’s and freely available on the Internet(a).
The ‘secret’ referred to in the title is revealed by Arundell to be that Plato’s Atlantis story is based on the account that we have of the Voyage of Hanno. He devote the second chapter to a discussion of a number of details in both accounts that suggest more than coincidence. I am not aware of any subsequent support for this novel idea.
*Thomas Arundell (1586-1643), 2nd Baron Arundell of Wardour*was apparently responsible for bringing the first two pieces of the Parian Marble to Britain from Paros in 1627 and presented one of them to the University of Oxford forty years later. The second piece was initially used to repair a fireplace in the Arundell home.