GRATIOT STREET PRISON - ST. LOUIS, MO: Money letter to prisoner, Elias P. Brewer, Gratiot St. Military Prison, St. Louie. Mo.; pen-canceled 3¢ rose with manuscript postmark "Salisbury, Mo. Apr 1" (1865);” Brewer had been sent to Alton, Ill. as evidenced by the notation "Alton, Ill. April 6th"; censor's "Exd" and "75 cents" at Alton; red docketing roughly erased breaking paper, rare use. Harrison only records 11 covers to/from Gratiot Street. Ex Harrison. $600.