Two letters on the same paper, one by Elizabeth Wells and the other by Horace Wells, with a short note in print capital letters by Charles, sent to Betsey Wells Shaw from Hartford on November 9, 1846; in black ink
Handwritten letter of introduction of Joseph Wales and his stakes in the discovery of anesthesia sent from Mayor Office in New York by Daniel F. Tiemann to Benjamin F. Pinckney on November 20, 1858; in black ink
Handwrittten note on the W. Harry Archer's office stationary to Janet Kubinec, curator of historical collection at the Health Professions Library, University of Pittsburgh explaining the provenance of the Horace Wells letters, to which a copy of the 1940 letter with details on acquiring the materials was attached
Two handwritten letters on the same paper, one by Elizabeth Wells and the other by Horace Wells sent to Joseph Wales from Hartford on September 20, 1846; in black ink
Handwritten letter sent from Washington, DC by Truman Smith to Joseph Wales on February 13, 1853 regarding the failed experiment of the previous day and the need to prove efficiency of the gas in New York; in black ink
Note, partially typed and partially handwritten, explaining the provenance of the bust of Horace Wells acquired by the Falk Library Historical Collection (University of Pittsburgh) through W. Harry Archer
A receipt issued to the Pennsylvania Association of Dental Surgeons for their monetary contribution to the future Horace Wells Permanent Memorial in Washington, D.C. donated in 1895
Colton Dental Association's broadsheet on the discovery of laughing gas and its anesthetic properties, with testimonials on painless tooth extractions.