VJ Day Illustrated Cover, 1945

This hand-drawn cover was recently purchased on e-Bay.
It is sent by S. P. Hamilton, 1717 Petre St., Christchurch, New Zealand to the United States of America. It has a Shirley 17 AU 45 G-class datestamp. The cover has a manuscript CCC29 on the front.
News of the Japanese surrender arrived in New Zealand at 11 a.m. on Wednesday 15 August, to widespread celebrations of this welcome news.
I have not seen illustrated covers of this sort before. Can anyone throw some light on the person who has done this?