Lists of cyphers. Some are numbered, i.e."2d cypher dispatched to Mr Scrafton". Many also give information about the use of the codes, means of disguising the message and notes about the cypher.
A list of letters received from Mr Watts between 28 April and 26 June 1757 concerning the Plassey campaign. The list details the date and number of each letter and states whether the letter was in cypher or plain text.