Governors always seek to monitor the flow of information and guide its release. Secrecy and tactical publicity are valued aspects of government, boosting authority but also marking limits of participation by restricting access to official words and their written expression. Close attention is given to two ubiquitous institutions in early modern London, guilds and vestries (material illustrating city government is also introduced). A distinction is drawn between concealed information and policy communicated to the people. Attention is given thus to the regulation of meetings, chests and keys, and the selective discharge of information. Secrecy gave rise to vocabularies of ‘public’ and ‘private’. It was a code (a form of protection), but in languages of ‘private’ and ‘public’ as they were used in specific contexts studied here, it also depicted the use of space, the distribution of authority, and the limits of access and participation. The study of secrecy and partial publicity adds another dimension to our knowledge of the formation of opinion, perceptions of authority were partly formed by this enclosure of information, secrecy spawned speculation. It also provides a linguistic indication of the nature of government in institutions which mouthed fraternal tunes while remaining obsessed with formality and secrecy.