Théun, would you be so kind as to answer the letter I forwarded to you from Z? He has sent you several letters asking you for co-operation in his work, and yet you ignore him.
I have NOT had SEVERAL letters from Z, and neither have I PROMISED to reply to ANY of the THREE that I have received! I have responded to TWO of those three letters, out of COURTESY, and NOT because I have EVER promised to reply to each and every email and letter I receive on a daily basis from around the world! Does Z think the world revolves around him? Does Z think he has something of VALUE to offer me? Does Z think I OWE him a living?