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 A.R.C. Selwyn to B.J. Harrington.
Letter from A.R.C. Selwyn to B.J. Harrington.
Letter from Wm.D. Marks to B.J. Harrington, written from St. John (N.B.).
Letter from Charles A. Brinley to B.J. Harrington, written from Philadelphia.
Letter from Persifor Frazer to B.J. Harrington, written from Philadelphia.
Letter from John Birkriebrie to B.J. Harrington, written from Philadelphia.