Served on the Institute Members' Committee [Polytechnic Council] and the Athletic Club Committee
Honorary Secretary of the Christmas Dinner Fund for over 40 years.
Organised the Polytechnic Lantern Society
Elected secretary of the Christian Workers' Union and joined the office staff in 1882.
Superintended the Polytechnic Holiday Home at Clacton-on-Sea and Ramsgate in 1890 and subsequent years. Also acted as host on the SS Ceylon and SS Viking for 15 years.
Made a Life Associate of the Polytechnic 1890.
Retired from the Polytechnic in 1929.
Joined the Quintin School in 1903 and then the Art School in 1906, first as a student, then as a pupil teacher and then Assistant Master. In 1913 he gained a Scholarship to the Royal College of Art.
From 1914 he served with the Poly A Company of the Rangers, rising from Rifleman to Q.M. Sergeant, before being commissioned into the 7th Battalion Middlesex Regiment. In March 1918 he was wounded and taken prisoner. His drawings from the POW camp are in the collection of the Imperial War Museum.
In 1915 he married Sybil Mayer, a fellow Poly Art School student.
After the war he re-joined the Art School as Assistant Master, at the invitation of the School Head, Mr Percival Gaskell, and taught continuously until his retirement in 1956. On his retirement he announced that he was returning to the Art school as a part-time student to study Lithography and Wood Carving!
Outside of his teaching work, Tresilian had a very successful career as a children’s book illustrator, including Rudyard Kipling’s Jungle Book and numerous Enid Blyton books.