Letter from Thomas Carlyle to Jane Wilson, 5 February 1838. See The Collected Letters of Thomas and Jane Welsh Carlyle, Durham, N.C.: Duke University Press, 1970-, v. 10, pp. 22-3. Transcription and more information available online at...
Letter from Charles Russel to Frank Linderman, dated 5 November 1917 with envelope from the Lewis Glacier Hotel (Lake McDonald Lodge) in Glacier National Park.