Letter from [William Thomas] Gordon, University of London, King's College, Strand, W. C. 2, to Edward Neville da Costa Andrade Sorry to hear about the destruction of Andrade's laboratory, commenting that his laboratory is luckily still intact. Discusses Kathleen Lonsdale's work on diamonds, explaining that she got on to something new in one of the ones he sent her, and has been following up [Robert] Robertson's work, which led her to seek working on all those he had examined. As Andrade had been in correspondence with Robertson, he referred Lonsdale to him, in case Andrade still had the gem in his laboratory. Identifies the missing diamond as being of particular scientific value and therefore of interest to Lonsdale, but having no intrinsic value. Suggests that as it is missing, it should no longer be referred to, and that if he receives any further enquiries about it, he will inform it has been lost. Informs that Dr Smith, who is working with Lonsdale, is anxious to get some more gems of this peculiar type (transparent over a wide range). 5 July 1941