Thank you for your letter of March 12. I understand very much how difficult it must be for you at this time to establish plans
so far ahead, but we need to know definitely who will be coming in the laboratory. I hope very much you will be able to come
sometime here and I keep you some laboratory space for the year 1964-1965 as you suggest.
We shall probably meet in the Royaumont meeting this summer. I hope it will be possible at this time to make more precise