The letter is addressed to Lord Simon, but the address at the foot is BR's. The letter is meant for BR.

Rotblat writes that he has received a cheque of £50 from Lord Simon for the expenses of the September conference.

He sends BR his "... belated but very sincere wishes on the occasion of your birthday. As a 'superannuated philosopher', you certainly keep a lot of 'juvenile' politicians hard at work to keep up with you, and I hope you will continue to do this for many more years."

Rotblat asks BR to sign a photograph for him.

A digital print of the carbon of this letter is available in Box 16.79, RA3 1816e, document no. 17.