Note: correspondence was filed by the Bureau sometimes in alphabetical and sometimes chronological order.

Writers of routine letters from the Bureau are not always named. Apart from the three main secretaries: Rita Hinden (1940-1945), Marjorie Nicholson (1945-1954), and Hilda Selwyn-Clarke (1949-1961), others include Catherine Hoskyns, Margaret Roberts, T.F. Betts, Rene Saran, Beryl Cross, Mary Winchester, Olive Cruchley, Dorothy Davies, Grace Turner, Phyllis Shand Allfrey, and John Larkman.