Autograph Letter Signed, on the writing paper of his son’s Laboratory, suggesting that his son, Walter Dalrymple Severn, is prepared to deliver a popular lecture on Bacteriology. 2 pp. 10 x 8 inches, a few stains. 1 December 1894. Walter Severn (1830-1904) was skilled in art furniture, and needlework and embroidery, as well as becoming a talented water colour artist.