Correspondents include: James Grigg [Principal Private Secretary to the Chancellor of the Exchequer] (3); 1st Lord D'Abernon, Chairman Thoroughbred Horse-breeders' Association; Sir George Barstow [Controller of Supply Services, Treasury]; Sir Horace Hamilton [Chairman, Board of Customs and Excise] (5); 17th Lord Derby.Also includes: details of the light horse breeding scheme; Newmarket [Suffolk] December sales 1926.Subjects covered by the file include: the furtherance of horse breeding; the Jockey Club taking a portion of the tax; charges for bookmakers using racecourse enclosures.