posts, including president of the Mathematical Association from 1920 through 1921, president of the Mathematical and Physical Section (Section A) of the British Science Association in 1927, and was president of the London Mathematical Society from 1828 through 1829. Whittaker also held the Gunning Victoria Jubilee Prize Lectureship for "his service to mathematics" with the Royal Society of Edinburgh from 1924 through 1928. He was elected either Honorary Fellow or Foreign Member in a number of academic organisations, including the Accademia dei Lincei in 1922, the Societa Reale di Napoli in 1936, the American Philosophical Society in 1944, the Académie royale de Belgique in 1946, the Faculty of Actuaries in 1918, the Benares Mathematical Society in 1920, the Indian Mathematical Society in 1924, and the Mathematical Association in 1935. In 1956, he was elected as a corresponding member of the Geometry section of the French Academy of Sciences a few days before his death. Whittaker was also awarded honorary doctorates from several universities, including two LLDs from the University of St Andrews in 1926 and the University of California in 1934, an ScD from the University of Dublin in 1906, and two D.Sc.s from the National University of Ireland in 1939 and University of Manchester in 1944. Later life Whittaker published many works on philosophy and theism in the last years of his career and during his retirement in addition to his work on the second edition of A History of the Theories of Aether and Electricity. He released two books on Christianity and published several books and papers on the philosophy of Arthur Eddington. Christianity Whittaker was a Christian and became a convert to the Roman Catholic Church in 1930. In relation to that, Pope Pius XI awarded him with the Pro Ecclesia et Pontifice in 1935 and appointed him to the Pontifical Academy of Sciences in 1936. He was a member of the Academy from 1936 onward and served as Honorary President of the Newman Society from 1943 to 1945. Whittaker published two book-length works on the topic of Christianity, including The beginning and end of the world and Space and spirit. The first of which was the result of the 1942 Riddell Memorial Lectures at Durham while the second is based on his 1946 Donnellan Lecture at Trinity College, Dublin. It has been remarked by physics historian Helge Kragh, that in these books, Whittaker was "the only