Letter from Charles A. Brinley to B.J. Harrington, written from Philadelphia.
Postcard, 2 June 1877
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, 5 January 1883
Typewritten letter from L. Geo English & Co. to B.J. Harrington, written from Philadelphia, offering molybdenite for sale.