i. Letter from the Atomic Energy Commission requesting Krishnan's help with finding accommodation and transport for the team from TIFR working on "The High Altitude Measurements of different components of cosmic radiation by Balloons". ii. Invitation on behalf of Dr Bhabha and Dr Dixit to deliver a lecture at the Institute of Science on "Electron Diffraction and Crystal Growth" and a colloquium at the Tata Institute of Fundamental Research on "Recent Cosmic Ray work". iii. Administrative letters from the Atomic Energy Commission.