Hudson, E.J.B. Papers: Box 8
Clarke, George Sydenham: Practical Geometry and Engineering Drawing. London, n.d. Technical Instructions: Department of Telegraphs. 2 vols. Illus. Simla, 1888. Professor Reilly’s Course of Mechanics applied to Construction. Diagrams. n.d. n.p.
Hudson, E.J.B. Papers: Box 3
Coopers Hill Society. Annual Reports 1906-36.