There is a cemetery in Oakfield Township, near Rockford, in Kent County, Michigan called White Swan Cemetery. There is an entry arch with a plaque remembering the "White Swan Civil War Boys". On the list of about 24 men includes the following Tower soldiers:
Capt. Samuel Tower
Henry Tower
Lewis Tower
George Tower
There is also a memorial erected about 1/4 mile down the road from the cemetery. It was erected by Ray J. Tower, in memory of his mother, Edith Newton Tower, and his sisters, etc....
If any one is interested in photos of these locations, please contact me at swolfy@charter.net