He became an apprentice copper worker in Newlyn, 1912 at the age of 12, recalling that by then he was the only pupil. Born in Newlyn, he was probably the last surviving member of the Industrial Class. His elder brother, Richard Harry TONKIN, was also in the class for a time.
A correspondent has written to confirm Tonkin's death in either 1982 or '83, at his home in Church Street, Newlyn.
Berriman (1986) Arts and Crafts in Newlyn
Hardie (2009) Artists in Newlyn and West Cornwall (p283)