It was his first radio serial featuring Afford's detective hero, Jeffrey Blackburn.
[2] The play was published in book form in 1942 under the titles Fly By Night and Owl of Darkness.
One critic wrote "by my stop-watch, averages a new knife thrown, pistol shot, warning received, or document stolen every minute.. it is VERY swift and forceful; but why Scotland Yard?
"[3] The production was very successful, selling to the BBC in England, as well as South Africa and New Zealand, and leading to several more Jeffrey Blackburn adventures.
When Afford was commissioned to write a second Blackburn serial he decided to keep Jeffrey married.