Clifford Walker Lee, an assayer by profession, was a member of the Chemical and Metallurgical Society of South Africa by January 1897. Though not listed as a member in 1899, he joined the renamed Chemical, Metallurgical and Mining Society of South Africa again in 1902, after the Anglo-Boer War (1899-1902). Earlier he had read a paper on "Dry grinding" before the society in 1895, which was published in its Proceedings (Vol. 1, pp. 149-152). In 1898 he reported on "Data of two experiments showing liquation in cyanide bars" in the society's Journal (Vol. 1, p. 116). Later he and W.O. Brunton published "Notes on the refining of base bullion" in the society's Journal for 1906/7 (Vol. 7, p. 358-).
Lee was declared insolvent in 1908. His wife Mabel E. Lee, born Norton, divorced him in 1919. He then married Agatha M. Lee, who died in 1922. At his death in 1948 he was survived by Augusta O. Lee, born Schnugh.