Letter from Bernard Clement Westall, Editorial Department, The Evening News, Carmelite House, London, to Charles Vernon Boys, St Marybourne, Andover Thanks Boys for his letter of 24 April [on forming fours] with the ingenious examples included. Westall hopes to return to the subject in a future article with more difficult numbers. He had not come across the gamma function before - it was not referred to in Rouse Ball's 'Mathematical Recreations'. 3 May 1940