The correspondence consists chiefly of original incoming letters and typescript carbon copies of outgoing letters. Included are a few letters addressed to others at the Curwen Press Correspondence with customers relating to a particular job is in series B, but some customers' correspondence relating to more than one job is kept together here. Most correspondence relating to the management of the Curwen business is in series D, but some correspondence with directors, specifically John Dreyfus, Simon Rendall, Herbert Simon, and Robert Simon (mostly letters kept together by Harley), is here.