No, this doesn’t really look like the site. But Mr O’Neill says of his drawing: “In the accompanying illustration I have ventured on representing the Mount Venus rock chamber, as I conceive it appeared when undisturbed, in order to give an idea of its gigantic character.”
In v2 of the journal of the Kilkenny Archaeological Society.
archive.org/stream/jstor-25489810/25489810#page/n8/mode/1up
Image credit: Henry O’Neill, 1851
