"Tuesday night." "I went to Charing Cross on the chance of meeting Wittgenstein, and there he was, so I brought him here and put him in my room and myself in the spare room, so it will get used at last.... Wittgenstein is a great joy. He found his father was just going to have an operation, so he felt he couldn't give his people the worry of an operation; but if he had been properly operated he couldn't have kept it secret; so he had a minor temporary operation performed secretly and will have another later. He is a great contrast to the Stephens and Stracheys and such would-be geniuses. We very soon plunged into logic and have had great arguments. He has a very great power of seeing what are really important problems. He starts for Iceland on Friday—it seems an odd place to choose, but I dare say it will be wholesome. Tomorrow he goes to Cambridge for the day."