[source: regimental orders book]
Head Quarters 91st Regt Penna Vols
September 23rd 1863
Special Order No [blank]
In pursuance of orders from Brig Hd Qrs Lieut J. A. Gregory is hereby relieved from duty with ord. Dept. and will report to the Ambulance Corps to take charge of Ambulances attached to the Brigade
By Order of
Jos. H. Sinex
Lt. Col Commdg
H W Shipley
Actg Adjt