|Publisher||George M. McKenzie|
|First issue||July 1945|
|Final issue||June 1948|
It began with Volume 1, Number 7 as the first 6 issues were published as Mac's Mysteries.
Initially issued gratis, it became a subscription periodical in August 1945.
There was a British Ring Convention Special ‘Priceless’ issue published in 1946.
- ↑ 317. GEORGE MACKENZIE: MAC’S MYSTERIES AND THE AVONDALE MYSTERIES, Complete Rich Cabinet of Magical Curiosities by Edwin A. Dawes(2005)