Thanks to Ros, the moderator of Aus-sagen mailing list for finding this letter being sold on ebay. James Alexander Alcorn was a distant cousin. He wasn’t called James but Lex instead.
He enlisted in the RAAF in Feb 1941.
In Mar 1941 Lex married Rona Mary Presgrave.
This letter Lex wrote to his parents is dated 8 Jul 1942.
On 16 Jul 1942 James Alexander Alcorn died in a flying accident over the North Sea, only eight days after writing to his parents.