Correspondence concerning Rebacca/Eureka project Correspondence with J W S Pringle regarding the transfer of the airborne radar team to the USA and regarding continued work on Rebecca/Eureka. Also includes an original technical manual for a Eureka beacon type AN/PPN-1, printed in Washington, DC, USA. J W S Pringle was a Cambridge biologist with whom Hanbury Brown developed Rebecca/Eureka. Hanbury Brown had departed for the USA in December 1942 and they continued to collaborate by correspondence. The design for the American Eureka beacon type AN/PPN-1 was Hanbury Brown's. 1943