Content advisory
This digitised material is free to access, but contains information or visuals that may:
- include personal details of living individuals
- be upsetting or distressing
- be explicit or graphic
- include objects and images of objects decontextualised in a way that is offensive to the originating culture.
Photograph of a letter from N MacLeod to J Negrin
- Date:
- 1940
- Reference:
- HALDANE/1/5/3/39
Licence: In copyright
Credit: Photograph of a letter from N MacLeod to J Negrin. Source: Wellcome Collection.
Provider: The original material is held at UCL Special Collections. This catalogue is held by the Wellcome Library as part of Codebreakers: Makers of Modern Genetics.
