For those who didn't know, the one surviving manuscript of the Westminster Confession of Faith is online for a time. The Braye manuscript contains some additional material as well (parts of the Grand Debate, a couple of things relative to church government that I think I confirmed are in v5 of the Van Dixhoorn minutes). It survived because it was taken and kept in a private collection so did not perish in either the Great Fire of 1666, or, what was not burned then the 1834 fire that destroyed Parliament.
Westminster College : The Assembly’s Confession of Faith presented to the Parliament
Following the outbreak of the English Civil War, the Westminster Assembly of Divines (together with a small cohort of members
cudl.lib.cam.ac.uk