The Killer Mine  The Killer Mine 
PAN G381 from 1960
Cover Artist Stephen Boldero
Printed by Richard Clay and Company Ltd., Bungay, Suffolk
The Killer Mine 
A letter included in the book. I think it says "Dear Mr. Snow, So sorry - these are only signed, no nice messages! However, you have at least something rare: I never sign paperbacks but to complete your set I have signed yours. My very best wishes, Yours sincerely R. Hammond Innes" 
Also issued by PAN Books as 409