1Ferguson, Samuel, George Petrie, and Margaret Stokes. The Cromlech on Howth: A Poem. London: Day, 1861.
Another page from the book, in color, may be seen here. A grayscale pdf of all the verse pages from the book may be viewed here. The text of "Aideen's Grave," as published by the author in his Lays of the Western Gael collection of poems (1888), may be read here.