Letter from Paul Dirac to Esther Salaman I would like to thank you very much for your kind hospitality during my stay in London. I was very glad to meet you and your family again, after a rather long interval. The children I could remember only as playing about on the beach, and now they have developed into personalities, with great intellectual and artistic gifts. You must be proud of them. I was specially glad for the talks I had with you on physics and with your husband on his field of work. I often read semi-popular articles on fundamental biological subjects in 'Nature', 'Endeavour', and such magazines, and continually run into questions which I would like to know the answer to, but there is usually no-one to ask. With talking to your husband I was able to put some of these questions, and get answers - or learn the difficulty of obtaining any answer - which is a great help to forming a clear picture of the subject. I hope we shall have similar talks in the future. With all best wishes, and looking forward to seeing you here next month. 10 January 1953