A collection of letters to Daniel M. Friedenberg at the Jewish Museum in New York from H. Edmund Hohertz, Dr. Arthur Polak in Amsterdam, Arie Kindler at Kadman Numismatic Museum, and L. Mildenberg at Bank Leu.
Spencer Douglass Crockwell was a commercial illustrator, experimental filmmaker, inventor, Mutoscope collector, amateur scientist, and Glens Falls, New York, resident. The Douglass Crockwell Collection contains Mr. Crockwell's personal papers, professional documents, films, Mutoscope reels, flip books, drawings, and photographs documenting his professional, civic, and personal life.