Collection includes certificates, diaries, correspondence and other papers belonging primarily to Benjamin Jagger, his daughter Minnie Jagger, and his grandson George Day. Benjamin Jagger (1822-1904) married Ann W. Wrigley in 1852. Their children were Louis Jagger, Frank Jagger, Minnie Jagger (later Minnie Vonderahe) and Olive Jagger (later Olive Day). George Day was their grandson.