James Campbell (1822/3–94)
Landowner. Of The Grove, Church End, Hendon, Middlesex. Born in Ceylon (now Sri Lanka). CD corresponded with a "Mr Campbell", who agreed to do some experimental work for him, in 1861.
BMD (Death index)
Census returns of England and Wales 1861 (The National Archives: Public Record Office RG9/786/44/19)
Correspondence Vol. 9, letters to T. H. Huxley, 22 October [1861] and 31 October [1861]
Post Office directory of the six home counties, 1862