Franz Jacobsen was one of Peierls's oldest friends, and a distant cousin, from Berlin days. He recounts his strange career in Bird of Passage, pp. 13-15. Comprises correspondence with Jacobsen from Thailand, 1953, and Heidelberg, 1974-1986. Includes brief correspondence 1986 with Ulrich Jacobsohn (son) on the deaths of his father in July 1986, and of Genia Peierls.