I quite agree with the submergence of the British Isles during the last or any Glacial period; but I totally disagree with the theory that there has been any such depression of the land as is generally put forward by geologists. Where is the evidence of such depression? Certainly not since Pliocene times, unless the whole of Great Britain sunk and rose simultaneously like the parallel motion of a beam engine. Such a motion would imply not only a surface movement, but also a sinking of all underlying strata.