Atwell Fort (Cza 1-1) is an Onondaga site located in Madison Co., Cazenovia Township, NY. It dates to around A.D. 1540. Rim sherd sample size = 88 vessels (Robert Ricklis = 32, Stanford Gibson of Norwich = 29, New York State Museum = 14, Rochester Museum and Science Center = 3, Indian Museum, Cooperstown = 2, Arthur Seelye of North Wolcott, Anton Sohrweide of Syracuse = 2, Syracuse U., Dept. of Anthro. = 2, Colgate U. = 1, Univ. of Michigan, Museum of Anthro. = 1). These ceramic attributes were recorded in 1969.