Just thought I would add that, since 1998, I've had the opportunity to read more by and about Edward (Ned) Harrigan, Muldoon's composer and the object of George M. Cohan's tribute song, H-A-R-R-I-G-A-N. There were two biographers, Moody and Kahn, and they tell an interesting story about the relationship between folk and early popular (i.e. mass market) songs in the mid to late 19th century.