This is a wild guess.....since the McNerney family was from Ireland, they were possibly Catholic. The town of Blue Earth (7 miles from Jo Daviess Twp) has a Catholic Cemetery with early burials. It is named Calvary, but it is now a part of the Riverside Cemetery. You could maybe write to the Riverside Cemetery Assoc. in Blue Earth MN 56013 and see if they have any McNerney/Burns burials.