A partial diary of this trip, 1891-92 is preserved, some letters and other papers and documents regarding his official duties at the Academy. Writings and personalia complete the collection.

List of signers: Binder, Jacob, n. do; Bryant, Henry G. 1893; Hart, Gavin W.; Heilprin, Angelo (9) 1892-94; Morris, Charles, n.d.; Nolan, E. J. (2) 1892.

The collection includes letters, reports, both administrative and scientific, lists of specimens taken and observed, photographs of the staff, equipment and area traversed. Original outline map of expedition routes drawn by R. E. Peary. Much information about the part played by the Academy of Natural Sciences, is preserved in its Publicity Scrapbooks. Peary flag, previously on display in the Museum, has been added to this collection.