Letters 391-463. 1965-67, together with some earlier letters and a complete list of ee letters 1-463. Note with bundle in GS's hand reads: 'the letters from M H M Boettinger were extracted from this set of photographic copies in order that they might take the place of the originals in the collection of letters to be deposited at Cambridge University Library. The originals of these letters are to be kept at home for the present.'