Considering my fondness for Leslie Charteris' character Simon 'The Saint' Templar, I am shocked that I have never before heard or come across Berkeley Gray (and his multitude of aliases) or his Norman Conquest series!?
The only reason I did stumble across this book was because it was part of a random collection of dramatised mystery/amateur-sleuth stories. The recording left me wishing I had more! As well as better context of both the characters and the writer, but even in this day and age, scouring the internet, more information and materials are not forthcoming... :(