Theodore Cook spent his early years in Wantage after his father, Henry Cook, became theheadmaster of King Alfred’s School in 1868, a year after his eldest son was born. He subsequently studied at Radley College, where he also pursued sporting activities becoming captain of the football and boating teams. He continued his studies. in Classics, at Wadham College, Oxford where he was a member of the boat club, and participated for Oxford in the 1889 Boat Race. He stayed in Oxford after graduation and in 1891 founded the "University Fencing Club". He continued being interested in fencing and was captain of the English Fencing Team in the 1903 championships in Paris and the 1906 championships in Athens. He was involved in the arrangements for the Olympic Games of 1908 in London, being one of the three British representatives on the International Olympic Committee.

In 1920 he won a silver medal in the art competitions of the Olympic Games for his "Olympic Games of Antwerp".

Theodore Cook’s legacy from his artist mother was an early introduction to the world ofpaintings, sculpture and architecture. This inspired him to travel particularly in Europe andto publish authoritarian works on Old Provence, Twenty-five Great Houses of France,Leonardo da Vinci and sculptor among many others, some of which were illustrated by his mother.This wide background in sport and literature led Theodore Cook into journalism. He wasfor some years editor of the St. James Gazette, the paper edited “for gentlemen bygentlemen”. As a freelance he wrote for the old Standard and contributed to the DailyTelegraph articles on rowing by “An Old Blue”. In 1910 he became editor of the Field, theCounty Gentleman’s Newspaper, a position he still held at the time of his death in 1928.His knighthood in 1916 was in his opinion a recognition of the work for the war effort byhis magazine rather than of his own individual contribution.He died of a heart attack on September 16, 1928.