Holmes was a second generation Gibraltarian,[3] born in Gibraltar to Gibraltarian parents Arthur Frederick Holmes and Mercedes Carrara. His father had been previously married and fathered five children from that relationship. Following the death of his wife, he married Mercedes who was later to be Alfred's mother. Alfred was to be the only child out of that relationship as his mother died when he was just three years old. His father later remarried one final time, fathering a further five children, giving Alfred a total of ten half siblings.
In the 1950s, Holmes enlisted in the Gibraltar Regiment where he later ascended to the rank of sergeant. He was appointed as a non-commissioned officer of Officer-in-Charge of the Apes.
From 1913 to 1991 the Gibraltar Barbary macaques were the responsibility of the British Army, which appointed a non-commissioned officer from the Gibraltar Regiment as Officer-in-Charge of the Apes. Holmes took over responsibility for the macaques from Gunner William Portlock, becoming the first Gibraltarian with this charge. During his service, Sgt. Holmes fed, nursed, and guarded the monkeys,[2] generally working to maintain their well-being.[4][5][6] He knew all of the macaques by the names he himself had given them. They were mostly named after Governors, brigadiers and high-ranking officers as well as his children.[7] Sgt. Holmes could communicate with the animals by means of eye signals and barely perceptible head movements which he would use to stop them from taking food offered to them by tourists.[2] He would even take young orphaned monkeys to his wife to help rear at home. He would also take sick or injured monkeys to the Royal Naval Hospital where they would receive the exact medical treatment as an enlisted soldier.[2] For his work with the macaques, he was best known locally by the nickname of "El de los monos" (Spanish: He of the monkeys).
Sgt. Holmes' time in the job made him an authority on this group of Barbary macaques, with his knowledge being sought by various scientific studies on the monkeys from around the globe.[1][4][7][8]
^ abFa, John E; Donald G, Lindburg (30 May 1996). Evolution and ecology of macaque societies. London: Cambridge University Press. p. 615. ISBN0-521-41680-9. This chapter is dedicated to the late Sgt Alfred Holmes, in memory of his more than 38 years' tireless caring for the Gibraltar macaques. Without his attention to individual monkeys between 1954 and 1992 our record of a 250-year tradition would have been much poorer.
^Westways, Volume 77. Automobile Club of Southern California. 1985. Retrieved 23 January 2010. Today Sgt. Alfred Holmes, a second generation Gibraltarian, is responsible for protecting the Rock's most important tourist attraction...
^ abBurton, Frances D (1972). "The Integration of Biology and Behavior in the Socialization of Macaca sylvana of Gibraltar"(PDF). Primate Socialization. New York: Random House. I would like to extend many thanks to Sergeant Alfred Holmes of the Gibraltar Regiment, Officer-in-Charge of monkeys, for tutoring me in the way of life of the monkeys and for generally assisting me with them. His extensive knowledge and comprehension of them was invaluable.
^La Fay, Howard (July 1966). "Gibraltar—Rock of Contention". National Geographic. 130 (1): 118.
^Burton & Sawchuk, Frances D & Lawrence A (September 1974). "Demography of Macaca sylvanus of Gibraltar". University of Toronto.
^ ab"The Apes: Our New Symbols of Shame". VOX. 3 August 2007. Archived from the original on 8 April 2008. Retrieved 28 July 2008. An army sergeant was responsible for their welfare. The sergeant, a local man by the name of Holmes, had a great love for the apes and a similar affection seemed reciprocated. He would personally feed them in the morning which, at the same time, gave him the opportunity to inspect for injuries. The apes when injured were taken to the RN hospital and received the same treatment as would an enlisted service man. He knew them all by the names he himself had given them. They were all named after Governors, brigadiers and high-ranking officers. When Holmes retired he was replaced by Asquez and then Zammut, both of whom followed the same procedure Holmes had kept in terms of discipline caring for them.
^MacRoberts, M. H.; MacRoberts, B. R. (1966). "The annual reproductive cycle of the barbary ape (Macaca sylvana) in Gibraltar". American Journal of Physical Anthropology. 25 (3): 299–304. doi:10.1002/ajpa.1330250309. PMID5971504.