Roster of Union Soldiers, 1861-1865 shows :

Hamley, William WI 41st Inf. Co.B

41st Wisconsin Infantry Regiment
Lt Col George B. Goodwin
Maj D. Gray Purman
Maj Jesse D. Wheelock
Regiment organised at Milwaukee in May & June 1864, being the third and last of the 100 day regiments
Left State 06/15/64 for Memphis
Fought with Forrests Cavalry in August, posted with the 39th in rear of the 40th
Suffered much from disease
mustered out at Camp Washburn in Sept 1864
Original strength = 578
Loss by death = 6
Desertion = 2
Mustered out = 570
[The Union Army, Vol IV, pp 69-70]