The Irish Traditional Music Archive doesn't seem to have any book of that exact title. The contents contain at least one Percy French song (Slattery's Mounted Foot, BTW - is Digging for Gold actually "Mountains of Mourne"?) so we're talking late 19C at the earliest for publication date.

Most of the song titles look fairly familiar. I must re read the list (can't see it at the momnet, for some reason) and pick 'em out.

Regards