Arthur was educated at Manchester Grammar School; Owens College, Manchester, and at the Victoria University of Manchester, qualifying M.B., D.P.H. in 1903, and M.D. in 1913. He served as a Civil Surgeon in South African War of 1900 - 1902, receiving the Queen’s South African Medal & 3 clasps, and the King’s South African Medal & 2 clasps. He entered the R.A.M.C. at the rank of Lieutenant on 1st September 1902, then served in India from 1904 to 1911. In 1912 and 1913 he served in the Balkans Campaign as the British Red Cross Society Commissioner with Turkish Forces. He was promoted to Captain on 1st March 1906, and became a Specialist of Bacteriology in 1912. On 10th May 1913 he served under the rank Brevet Major, then gained the rank of Major on 1st March 1914. Arthur embarked for France on the 9th August 1914 with the headquarters of divisional formations, as Deputy Assistant Director of Medical Services for the First Division. From 30th January 1919 to 31st May 1920 he served under the rank Temporary Lieutenant Colonel, and at the beginning of 1919 succeeded Lt/Col Webb as A.D.G.M.S. at the War Office 1919-1920. He was awarded the Commander Order of the British Empire on 12th December 1919, and was seconded to Ministry of Health in 1920. He retired with pay on 13th November 1920, and was granted the rank of Lieutenant Colonel. He ceased to be on the Roll of Officers on 1st December 1928. Arthur was the son of Samuel and Sarah Jane [nee Rowley] Smallman; and the husband of Alice Florence, daughter of R G Duncan - they has 2 sons.