As camels, whether taken with one hump or two, are rather rare in Irish folklore to have them turn up twice in the same line seems a little excessive. I wonder if the lines in the second verse were misprinted by Blackwood's Edinburgh Magazine. They would surely make better sense as:-
His stature it was tall As a cameleopard or dromedary, O
A "cameleopard" being an old term for a giraffe - not that they feature much in Irish folklore or history either. Although wasn't there a story of a Dublin man who took a young lady to the Zoological Gardens to show her the neck of the giraffe but he was spotted?