BIBLIOGRAPHY
- Gill , David . Man and Astronomer George Forbes .
- History and Description of the Royal Observatory, Cape of Good Hope, by Sir David Gill
- 1915 . Proceedings, A , xci Royal Society of London., p. xxvi (Dyson)
- Nature , 92 635 Feb. 5, 1914. (Dyson.)
- 1915 . Transactions , v Royal Society of South Africa.-16, p. 195 (Roberts)