Cronin was not only a precocious student at Dumbarton Academy[2] who won many prizes and writing competitions, but also an excellent athlete and footballer. From an early age, he was an avid golfer, a sport he enjoyed throughout his life, and he loved salmon fishing as well. The family later moved to Yorkhill, Glasgow, where he attended St Aloysius' College[2] in the Garnethill area of the city. He played football for the First XI there, an experience he included in one of his last novels, The Minstrel Boy. A family decision that he should study for either the church or medicine was settled by Cronin himself, who chose "the lesser of two evils."[3] He won a Carnegie scholarship to study medicine at the University of Glasgow in 1914. He was absent during the 1916-1917 session for naval service. In 1919 he graduated with highest honours, with the degree of MB, ChB. Later that year he made a trip to India as ship's surgeon on a liner. Cronin went on to earn additional degrees, including a Diploma in Public Health (1923) and his MRCP (1924). In 1925, he was awarded an M.D. from the University of Glasgow for his dissertation, entitled "The History of Aneurysm."
During World War I