From BBC Science's Tom Cholmondeley, likely referencing Nash and Krishnan's work in BBC documentary Moments of Genius

Apart from letters sent and received by Krishnan, this series contains correspondence around preprints of scientific papers such as galley proofs and reviewers’ comments. Notable correspondence includes a letter from Obaid Siddiqi inviting Krishnan to join TIFR, general letters from colleague and friend, Veronica Rodrigues, and a note that Krishnan wrote to Howard Nash for his 40 years of contributions to science.