HCR diary 24.11.1821 at Aders' "a Mr Campe an Elberfelder - an intimate of A's in particular pleased me by his great kindness of manner & amiable countenance without the too frequent accompaniment of want of understanding - he has had a commercial education by residence in England and has now a flourishing establishment at home"
Possibly H W Campe wool merchant at 22 (Little) Bush Lane, Cannon St from 1820 to 1825 (Land Tax, SunFire 1822, Pigot's Directory 1822) but I found no more about him