Certificate, Master Mason, from the Harmony Lodge Masons [Champlain, NY] to W. Beaumont. April 11, 1820.
W. Beaumont and Deborah Beaumont [Mackinac, MI] to her parents [Plattsburgh, NY] regarding: family news. December 18, 1823.
W. Beaumont's notes on preparation of citrate of morphia and potato paint. On verso, a note on use of croton oil. October 1825.
Three texts:  "Notes, Remarks etc.," an extract from a report from a speech in the British House of Commons about General Hastings (pp. 1-11).  W. Beaumont, Ft. Niagara, initial lines of a draft letter, evidently discontinued.  Extract from the Medical Recorder, no. 33, p. 204 in The London Medical and Physical Journal for August 1825 regarding: counterfeit diseases. March 11, 1826.
J. L. Lee, Second Auditor's Office, Treasury Department [Washington, DC] to W. Beaumont [Fort Howard, Green Bay, WI] regarding: returns of medical and hospital stores for 1826. August 9, 1827.
W. W. (William) Matthews, American Fur Company [Mackinac, MI] to W. Beaumont [Green Bay, WI] regarding: encounter with St. Martin at La Chalupe and request for reimbursement of expenses. August 13, 1827.
James Eakin, Second Auditor's Office, Treasury Department [Washington, DC] to W. Beaumont [Green Bay, WI] regarding: returns of medical and hospital stores. November 16, 1827.
Warrant Number 138 from Richard Rush, Treasury Department [Washington, DC] to W. Beaumont [Green Bay, WI] regarding: money of the estate of Richard Fleming. January 26, 1828.
Letter and resolution of the Medical Society of the Territory of Michigan from R. S. Rice, Secretary, to W. Beaumont [Green Bay, WI] regarding: W. Beaumont's able report on the case of the wounded stomach and the experiments on digestion read at its annual meeting in January 1828. March 20, 1828.
W. B. Lewis, Second Auditor's Office, Treasury Department [Washington, DC] to W. Beaumont [Fort Crawford, Prairie du Chien, WI] regarding: returns for medicines and hospital stores. December 22, 1829.
R. Jones, Adjutant General's Office [Washington, DC] revoking W. Beaumont's furlough. October 24, 1831.
Zachary Taylor, First Infantry [Fort Crawford, WI] special orders regarding W. Beaumont's furlough along with orders to take care of the sick and wounded militia as far as Saint Louis. August 22, 1832.
W. Beaumont and St. Martin, four articles of agreement [Plattsburgh, NY]. St. Martin to submit to the experiments of Beaumont under conditions fully set forth. October 19, 1832-November 7, 1833.
Case book and aphorisms of W. Beaumont, Second Infantry regarding: patients Keefe, Ferguson, and Hinkley. December 2, 1826-1830.
W. Beaumont [Washington, DC] to Robley Dunglison [University of Virginia] regarding: expressing gratitude for interest in Beaumont's gastric experiments, a sample of gastric juice sent to Dunglison. January 25, 1833.
Thomas Sewall [Washington, DC] to J. K. Mitchell [Philadelphia, PA] regarding: letter of introduction to Mitchell regarding analysis of gastric juice. February 5, 1833.
Joseph Lovell [Washington, DC] to W. Beaumont [Plattsburgh, NY] regarding: pay arrears for St. Martin sent and manuscripts returned by Lovell. April 19, 1833.
W. Beaumont to Professor Thomas Sewall [New York, NY] regarding: credentials sent. March 1, 1833.
Orders from Joseph Lovell, Surgeon General's Office [Washington, DC] to W. Beaumont [New York, NY] regarding: transfer of funds to Russell on leaving New York. June 13, 1833.