•1 letter dated December 20, 1837
Sin títuloA letter from Jane Fergus to Hugh Cleghorn, dated 7 December, 1839
Sin títuloCorrespondence; see “Aglen Collection”. “W.H. Campbell Correspondence” Botanical Society of [Edinburgh] Scotland (BSS)
Sin título• One letter (June 21, 1847), Botanical Society communications
Sin título