During WWII, when Richard Feynman was recruited as one of the country’s most promising physicists to work on the Manhattan Project in a secret laboratory in Los Alamos, his young wife Arline was writing him love letters in code from her deathbed.

Link: https://www.brainpickings.org/2017/12/11/code-girls-liza-mundy/?utm_source=Brain+Pickings&utm_campaign=5ab98a43db-EMAIL_CAMPAIGN_2017_12_13&utm_medium=email&utm_term=0_179ffa2629-5ab98a43db-236388809&mc_cid=5ab98a43db&mc_eid=01fa247c60