The Maid of Bunclody was printed as a broadside c1860 by Brereton of Dublin. The tune I remember is even more closely related to 'The Strands of Magilligan' which came to England via Liverpool as ' The Streams of Nantsian' and then when it reached sourthern England became 'The Streams of Lovely Nancy' all via broadsides interchanging with oral tradition. 'Strands of Magilligan' would be at least 18thc but John Moulden would have more to say on this. I have no record of a Bunclody tune in the likes of Bunting, Petrie, Joyce etc. but then I don't read music and it may be there under another name.

HC may well have been influenced. The period is right.