- Six Months in Ascension: An Unscientific Account of a Scientific Expedition
- Catalogue of 2798 Zodiacal Stars for the Epoch 1900: Arranged for Differential Observations of the Planets in Accordance with Resolution 9 of the ... Étoiles Fondamentales," Held in Paris in 1896
- Catalogue of 1905 Stars for the Equinox 1865-0
- David Gill, Man and Astronomer: Memories of Sir David Gill, H.M. Astronomer (1879-1907) at the Cape of Good Hope
- Catalogue of 1680 Stars for the Equinox 1900·0: From Observations Made at the Royal Observatory, Cape of Good Hope, During the Years 1905-1906