Hand Transit
Ibid.
from Richard A Proctor (1888) Transits of Venus: A Popular Account of Past and Coming Transits from the First Observed by Horrocks A.D. 1639 to the Transit of A.D. 2012.
from Account of observations of the transit of Venus, 1874, December 8. GB Airy Ed.
from George Forbes (1874) The Transit of Venus.
