[source: regimental orders book]
Head Quarters 91st Regt P.V.
Dec 20th 1863
Special Orders
No 120
In compliance with Orders No 124 from Brig Hd. Qts. the calls for "Reville" [sic] and "Tattoo", will be taken up by Regts as follows. when the Brig bugle has ceased, the calls will Sounded [sic] by the 146th N.Y. Vols, and "Reville" [sic] and "Tatoo" beaten, to be followed in turn by the 155th Pa Vols, 140th N.Y. Vols. and 91st Pa Vols, in no case will any two Regts have any of the above calls blown or beaten at the same time
By order of
Jos. H. Sinex
Lt. Col Comdg
D. B. Baker
Lt. & Act Adjt