1. C-SCAPE: Centre for Scientific and Curatorial Analysis of Painting Elements, Department of Chemistry, University of Winnipeg, 515 Portage Ave., Winnipeg, Manitoba, Canada, R3B 2E9 (D.G., J.M., A.S., M.A., E.C., C.C.); and Winnipeg Art Gallery, 300 Memorial Boulevard, Winnipeg, Manitoba, Canada, R3C 1V1 (C.C.)