A rare signed copy of 'An Introduction to Polo' by ''Marco'' [Lord Louis Mountbatten], published by Country Life, first edition 1931, presentation cop

A rare signed copy of 'An Introduction to Polo' by ''Marco'' [Lord Louis Mountbatten], published by Country Life, first edition 1931, presentation copy to Mr Herbert Pratt of Country Life, signed by Mountbatten and dedicated to Mr Herbert Pratt with a note 'With gratitude to Mr Herbert Pratt for making such a lovely book from such unworthy material', Limited Edition to 100, blue and cream hardcover with gilt title; sold together with a personalized letter to Mr Pratt from Lord Mountbatten dated 14th May 1931 on Royal Naval Polo Association headpaper, (2)