Berwick, Maine: Pythian Sisterhood, 1897. Letterhead illustrated with the seal of the Pythian Sisterhood, a female auxiliary to the Knights of Pythias, a fraternal organization and secret society formed in 1864. This letterhead was used by the Maine branch of the organization, located in Berwick and founded in 1889. Measures 10.5" by 8", lined. Very good. A little toned, on e closed short tear to right-hand margin.