Correspondence with the Bielenberg family, mostly Peter, Christabel, John and Christopher Bielenberg. Includes letters regarding Adam von Trott, Gena [Yevgenia] Gutkina and Peachy and Secky [Leapeetswe and Sekgoma Khama]. Also includes transcripts of an interview with Peter Bielenberg, obituaries for Christabel and Peter Bielenberg, copy of letter to Christabel Bielenberg from Dennis Potter, photocopies of letters from Wilfrid Israel to Adam von Trott [originals dated 1936-1940].