TIL there is/was an Officer in the British Army, "Keeper of the Apes", that was charged with the care of the Rock's macaque population.
https://en.wikipedia.org/wiki/Barbary_macaques_in_Gibraltar#Officers_in_charge
[snip]
Gibraltar's Barbary macaque population was under the care of the British Army and later the Gibraltar Regiment from 1915 to 1991, who carefully controlled a population that initially consisted of a single troop. The 'Keeper of the Apes' would keep the official records, maintaining an up-to-date register for each monkey, listing their births and names and supervising their diet, which they drew officially every week. The food allowance of fruit, vegetables and nuts was included in the budget, set by the War Office at £4 a month in 1944.[12] They would humorously announce births in the 'Gibraltar Chronicle': "Rock Apes. Births: To Phyllis, wife of Tony, at the Upper Rock, on 30th June 1942— a child. Both doing well."