"It won't be half of all my mail, I assure you." That was probably the most tiresome part of the job, really. He wasn't good at sending cordial replies that put people at ease. His policy of telling people - somewhat more politely - to get stuffed probably resulted in more letters than he might otherwise have had to field. "Although - if you take on the lot of it for a week, I'll be happy to sign on with Horace's - three quarters of a brain, did you say? Generous though your estimate may be."