On a part of the line in Kanchanaburi, Chalker used stolen paper and other materials to record the torture, malnutrition and illnesses endured by the prisoners.
Chalker's works, together with those of fellow POW artists Philip Meninsky, Ashley George Old and Ronald Searle form a unique record of prisoners' suffering during the building of the railway and were used in evidence at the subsequent Tokyo War Crimes Tribunal.
[3] In 1995 an exhibition of the works of the four artists was held at the State Library of Victoria under the title 'The Major Arthur Moon Collection'.
When that college became part of Bristol Polytechnic in 1969 Chalker became Head of the Faculty of Art and Design in the new institution and retained that post until he retired in 1974.
[2][4] Ill-health resulting from his wartime treatment led to Chalker selling many of his Burma sketches in 2002 in an auction that gained worldwide attention.