Letter from collector Clarance S. Bement to Prof. O. D. Allen of the Sheffield Scientific School of Yale University regarding prisms he would like to acquire.
Letter from C.S. Drummond to B.J. Harrington, written from Winnipeg.
Letter from C.S. Drummond to B.J. Harrington, written from Winnipeg, thanking Harrington for coal analysis.
Letter from C.W. Wilson to B.J. Harrington, written from Mcgill College.
Letter from D. A. Grant to Simon McTavish, 8 June 1792