According to Miller
[M], John Mystery was aWoolworth's identity and writer of children's stories.
(Not sure what a ‘Woolworth's identity' means, but maybe on the management
level). The records were apparentoly selected by this mystery man, and
pressed by Recording Centre Pty Ltd in Sydney. No doubt because of his
authorship interests, the label included childrens records, as well as
jazz and ‘pops'. It appears that a series of record postacrads were also
released. The period is 1949, 1950.
Record in collection:
A043 c3 JOHN MYSTERY'S
NEW JAZZ SERIES [Australia]
The recording of the above was made in Sydney on 31 May 1948. It appears there were five records of the Port Jackson Jazz band on this label, numbers NJ-1001, to NJ-1005. The band of course was recorded and released on several other labels.
Note that of the information found on the internet, there is nothing about his record label - that I could find anyway - other than the above contribution.
“John Mystery” was an Australian
children’s publishing phenomenon. His real name was Lester Sinclair and
he operated from a castle in Sydney, “Adventure Castle”. His books always
include, on the inside back cover, a letter to his young readers, beginning,
“Dear Cobber”, and ending with, “I shall be looking for your letters! Yours
merrily, John Mystery. My address is – John Mystery, Adventure Castle,
Sydney. That’s all you need to put!”
In an article "Sutherland:
Mapping A Literary Heritage", by Edward Duyker, found on the internet was
the following interesting snipet: