Contains official correspondence from Grunthal's work as curator of the American Numismatic Society, mostly relating to the cost and historical values of coins, medals, and paper money.

Correspondence mostly pertaining to Eidlitz’s efforts to add to his collection of medals and plaques relating to architects, as well as photographic plates and other materials having to do with his book on the topic.

Correspondence and notes mostly relating to Marvin’s research on Masonic medals. Includes rubbings, wax impressions, photographs, and illustrations of coins and medals, as well as printed materials related to Freemasons.