Is there a mythical, vanishing island off the western coast of Ireland?

The above early world map shows the Island of Ireland closer to Britain than it actually is, even allowing for drift over the intervening periods. If the early cartographers go insular geographical proximity wrong, might they also have also gotten other hypotheses wrong?

Murph, Jump back!!! This is important stuff!!!

I do believe. There is a lot of magic in this world that we cannot explain.

The Zeno Map of the voyage to North America by Prince Henry Sinclair of the Orkneys and Scotland also places an island there. The ocean floor does show a raised plateau in the area but sealevel has not been below its shores since the major ice ages long before the mentioned sightings. Map ancient map makers often included mythical lands in areas that lacked topographical information.

Kerry, I just love this article. It's true folklore, so enjoyable . Finally an uplifting story, a lovely change from doom and gloom and politics. Thank you.

"There are more things in Heaven and Earth, Horatio, than are dreampt of in your philosophy"

Sounds to me like some or all of those who saw the island might have had a drop taken. If that is not the case, I read weeks ago in the Times that various nations are, as we write/read, mapping and divvying up the ocean floor for purposes of, e.g., getting the gold and silver from long-time sunken ships. Apparently they now have, or very nearly have, the technology to do that. That being the case, and if they can go deep enough keep the sharks at bay, they might find an interesting thing or two in this 21st century.

Here all the time I thought it was High Brasierre!