(1) Research vol 1 à 2, Londres,  E. W. Allen, 1889, p. 166.

(2) The Midland Naturalist,  vol. 13 à 14, Birminghan, The Heradd Press, 1890, p. 22.

(1) A large collection of caddis cases, some of them built under special circumstances, also seaweeds and British, African, and New Zealand ferns by Mr H. Hawkes.

(2) A large collection of caddis cases, also a series of seaweeds, and British, African, and New Zealand ferns by Mr H. Hawkes.