This collection contains the correspondence of Newton C. Brainard, a Past President of the Connecticut Historical Society, as well as the correspondence of Thompson Harlow, former Director of CHS, all of which relates to their research on the origins of the seal of the city of Hartford that was reportedly first used on a diploma bestowed upon Hector Lewis St. John Crèvecoeur (1735-1813) in 1785 by the mayor of Hartford. There are also research notes, an exhibit placard, newspaper articles, and pictures of the original Hartford seal. The collection also contains an embossing of the seal itself.