Possible Clues:

• Governor General John
• German book by an author from Scotland
• Author of 'Greenmantle'
• A writer taking cake without tea
• Martin, the Scottish international who collected the FA Cup in nineteen seventy seven
• Martin, who led the way up the thirty nine steps at Wembley in nineteen seventy seven
• Scottish writer, young, raised dynasty
• The Thirty-Nine Steps author
• Author having tea tucked into cake
• Writer taking tea without cake