R. Davison [Letter to Ann E. Kelly Denaut from R. Davison, Chemist] Date March 19, 1879 Location Canada Ontario Delta Dimensions Paper (Letter): 7 1/16 x 8 15/16 in. (17.9 x 22.7 cm) Print medium Ephemera Credit Line Museum Purchase, 2006 Accession No. 2006.10.171