Sexton Blake is a fictional character, a detective who has been featured in many British comic strips, novels and dramatic productions since 1893. Sexton Blake adventures were featured in a wide variety of British and international publications (in many languages) from 1893 to 1978, comprising more than 4,000 stories by some 200 different authors. Blake was also the hero of numerous silent and sound movies, radio serials, and a 1960s ITV television series.

https://en.wikipedia.org/wiki/Sexton_Blake#Radio