Patterson who was Head of the Department of Molecular Structure at the Institute of Cancer Research, Fox Chase, Philadelphia, died in November 1966.

In a letter of 20 Oct. 1966, Hodgkin described Patterson as the person 'who had made the most difference to x-ray crystallographic studies after the initial discoveries in 1912-15 of x-ray diffraction and structure analysis'. In her opinion, his 1935 paper, 'A direct method for the determination of the components of interatomic distances in crystals', had been 'used in the solution of the vast majority of crystals studied anywhere since 1935'.

Includes obituaries.