[1] In 1872, on his return from sea, Tupman was assigned to assist with the British expeditions to observe the 1874 Transit of Venus, soon being appointed as head instructor.

'[4] Tupman oversaw recruitment and training of the team of observers (including with the use of a clockwork model), and organised the equipment and transport for all five official British expeditions.

After returning to Greenwich, via a trans-continental rail journey across the US, he spent around four years working without pay on the data that had been collected on the five expeditions.

[7] Tupman (and his wife Rebecca, who he had married in 1876) observed the 1882 transit of Venus from Burnham near Christchurch, New Zealand.

[14] As well as a selection of Tupman's official and private papers relating to the Transit of Venus enterprise, the recent digital collection contains The Life & Adventures of Station B, two albums of caricatures by Lieutenant Evelyn Noble, one of the Honolulu observers.