Career
His time in the first round was 4:03.4, beating the Olympic record set by American Mel Sheppard only minutes earlier by 1.6 seconds. In the final, Sheppard matched Hallows" first round time while Hallows finished in third place at 4:04.0. Hallows studied at Felsted School, Keble College in Oxford, Leeds University, and Street Thomas" Hospital in London.
He took part in the Balkan Wars of 1912-1913 as a Red Cross staff and later in World War I, as a Captain of the Royal Army Medical Corps in France.
In 1919 he was appointed as the resident Medical Officer at Marlborough College. Using the penname "Duplex" he co-wrote several books on engineering.