Rory McIlroy and the grandest prize in golf

The grand slam in golf is a feat almost impossible to imagine now. It meant winning all four golfing majors in the same year, and has only been done once, by the extraordinary Bobby Jones in 1930. Jones was awarded a ticker-tape reception in New York, and a golfing writer of the time with a feel for geometry called it ‘The Impregnable Quadrilateral’, a fortress that could never be taken.