Jim,
I found an old post or yours which informs us that you’ve published "The Harp and the Eagle: The history of Mulligan's Irish Brigade."
What I find is this book authored by Susannah J. Ural, is this your work?
The Harp and the Eagle: Irish-American Volunteers and the Union Army, 1861-1865 Nov 1, 2006 by Susannah J. Ural
My wife’s grandfather, James J. Kneeland served with the regiment during it’s first year.
George Martin
Spark’s Nevada
ggmartin55@yahoo.com