Six Months in Ascension. A Unscientific Account of a Scientific Expedition
- With a Map. liv, 285pp. 8vo
- London: John Murray, 1878
London: John Murray, 1878. With a Map. liv, 285pp. 8vo. Bound in three quarters modern brown polished calf and marbled boards, red leather title label. Fine. With a Map. liv, 285pp. 8vo. Life on Ascension Island with her husband Scottish Astronomer David Gill to measure the solar parallax-the distance between the Earth and the Sun-by observing Mars, which was then the closest to Earth than it had been for a century.