straight line town mark with manuscript date and “25 ” rate on 1831 folded letter to Brigadier General Hugh Brady in Detroit, letter written by Captain Joseph C. Plymouth contains a “detailed report of the encroachment of the whites upon Indian lands in the vicinity of the Fort”, extremely fine and rare, this is the earliest recorded postmark from Fort Winnebago and the only known example of this straight line handstamp, one of the gems of Wisconsin postal history, ex-Jarrett and Risvold