The fonds consists of 4 series: the Frank Sylvester series, ca. 1862-1908; the Cecelia Davies Sylvester series, ca. 1854-1928; Family ephemera series, 1867-1918, and Photographs, ca. 1870-1950. The Frank Sylvester series includes: cannery contracts, legal invoices, lecture manuscripts, and a diary. The Cecelia Davies Sylvester series includes: an autograph book, and scrapbooks containing clippings, photographs and ephemera. The Family ephemera series includes: biographical information, documents, pamphlets and publications. The Photographs series includes: photographs, negatives, and glass plate negatives.