The sextant was a gift from the British Admiralty for retrieving the lost guns of HMS Niobe in 1874 .
In his memoirs , Farquhar mentions that he regretted losing a sextant on board the sinking Havana .
The sextant was a sextant from the British Admiralty for retrieving the lost guns of HMS Niobe in 1874 .
In his memoirs , Farquhar mentions that he regretted losing a sextant on board the sinking Havana .