@slimfern posted:Thanks El
Think I'll give this one a miss....especially as even Mr Welles was not keen to put his name to it
I saw a little clip from "Treasure Island" and I agree with you about giving it a miss 
Back in 1938 so before "Citizen Kane", Orson Welles had his Mercury Theatre. Some of that work was made for radio, the most famous being his version of "The War of the Worlds" which caused a certain amount of panic amongst listeners thinking that the Martians had really landed.
Another adaptation was "Treasure Island". If you are interested that's on Youtube:
https://www.youtube.com/watch?v=sLXpdv0eI78
In that Welles played both the adult Jim Hawkins (I assume as a narrator) and as Long John Silver. Also features some of the actors who went on to be in "Citizen Kane" - Agnes Moorehead as Mrs Hawkins (Mary Kane), George Coulouris as Captain Smollett (Walter Parks Thatcher), and Ray Collins as Ben Gunn (James W Gettys), The names in brackets being their roles in Citizen Kane. Although Joseph Cotten was in a few of those radio adaptions he wasn't on this one.