This series contains letters addressed to Josiah Cox as well as to Josiah and his wife Henrietta. The professional records are chiefly from Cox's employment at Lincoln University, Pennsylvania. The organizational records are from Cox's membership in various Greek organizations (Kappa Alpha Psi, Phi Sigma, and Sigma Xi). The small quantity of personal records consist of an address book, information of the funeral of Cox's son William, various programs, and information about Josiah and Henrietta Cox's 35th wedding anniversary.