Further Sowerbys :
Henry (1825-91 - the brother of George Brettingham II)
John Edward (1825-70)
James (1757-1822) was founder of the dynasty and wrote 'Mineral Conchology'
(1812-22). He is not to be confused with James de Carle (1787-1871) who was
his eldest son; George Brettingham I was also his son.
Sources : Cleevely, 1974 : Journ. Soc. Bib. Nat. Hist. vol. 6 : 514-524;
Sowerby, A. de C., 'The Sowerby Saga' (1952); Dictionary of National
Bibliography.