Records of the Signet Office relating to the use of the signet seal as an authority for official royal acts.
King's bill's are in SO 7; docquet books containing short summaries of their contents are in SO 3, with indexes in SO 4. Warrants for king's bills are in SO 8 and SO 6. Irish letter books are in SO 1, with indexes in SO 2. Miscellaneous other records of the Signet Office are in SO 5