the mainstay of internal parasite control in sheep in Australia until the 1960s, when broad-spectrum anthelmintics became available. Gordon also played a major role in the introduction of thiabendazole (a member of the benzimidazole family) as an anthelmintic for sheep in the early 1960s. In September 1961 in the journal Nature, he reported on his laboratory and field trials that demonstrated this compound exhibited a very high degree of anthelmintic activity against most of the major internal parasites of sheep. Whilst the use of thiabendazole has waned, newer generation benzimidazole compounds such as albendazole and fenbendazole are to this day used widely in people and domestic animals. Australian Veterinary Association Hugh Gordon actively served the veterinary profession in many other roles. He was active in the affairs of the Australian Veterinary Association (AVA) at state and national level. He served the NSW division as secretary from 1933 to 1944 and president in 1941 and 1942. He was elected National President of the AVA in 1951. He also served as Honorary Librarian of the AVA's Max Henry Memorial Library from 1932 until 1990. In recognition of his services to the Australian Veterinary Association, he was elected a Fellow. His Fellowship citation in 1959 stated that "through his work and writings, through the many students who have sat at his feet and by his willingness at all times to extend help and friendship to his colleagues, Mr. Gordon has attained a worldwide reputation both as a parasitologist and for his personal qualities". Retirement Such was Gordon's dedication to veterinary science and parasitology, he continued to devote his time to these pursuits following his official retirement from the CSIRO in 1974. He continued to make his daily trek from Manly, taking the Manly Ferry then the 440 bus to the Camperdown campus of the University of Sydney. He divided his time between the Veterinary Science faculty, where he was a demonstrator in parasitology practical classes, and the Max Henry Memorial Library, where he was Honorary Librarian. He continued to devour scientific journal articles on parasitology, keeping abreast of new developments and discoveries. In 1995 the Max Henry Memorial Library was disbanded much to Hugh's dismay. This marked the end of his time at the University of Sydney, 21 years after his official retirement and 64 years after he started at the McMaster Laboratory. In "Hugh McLeod Gordon an appreciation on his 80th birthday",