Secret writing in the public records, Henry VIII-George II /
Great Britain.Public Record Office.
Richards, Sheila,1929-
London : H.M.S.O.,
1974.
'... contains documents written wholly or partially in cipher which are here deciphered and printed in full for the first time ... they range in date from 1519 to 1738 ...' - book jacket. - Includes letters in French and Italian with a summary in English
Includes index
Ciphers.