
Osborn portrayed Sherlock Holmes in a 1951 BBC production of the Conan Doyle tale "The Adventure Of Mazarin Stone" - A 30 Minute TV movie.
Osborn was a prolific actor of the 30's and up to the end of the 1950's when he spent the rest of his career as a producer and director.
Osborns Doctor Watson was played by Philip King whom we are still trying to track down both a photograph of him as Watson as well as an autograph.
As always if anyone has any ideas of how to source either of these Howard and myself would love to hear from you.