This volume contains approximately 175 letters written by Thomas Penn and Richard Penn on public business. A few are copies of letters by James Hamilton, a member of the Provincial Council and lieutenant governor of Pennsylvania, and by or to Abraham Taylor.

Partly copied by Redmond Conyngham from the state records and part from and with the reports of Judge Gibson and Judge Thomas Cooper. Relates to dispute over Wyoming valley lands between Connecticut and Pennsylvania. Includes correspondence of Lord Amherst, John Armstrong, Jr., Charles Biddle, John Boyd, Zebulon Butler, Thomas Cooper, Thomas Fitch, John Franklin, James Hamilton, Joseph Hamilton, William Montgomery, John Penn, Richard Rush, Jonathan Trumbull, and Roger Wolcott.

Reports on conferences and treaties with the Indians and miscellaneous Indian affairs in Pennsylvania, with emphasis upon the French and Indian War. Correspondents include: John Armstrong Thomas Barton Edward Braddock Daniel Claus George Croghan James Hamilton James Logan Hugh Mercer Andrew Montour Robert Hunter Morris Robert Orme Ferdinand J. Paris Thomas Penn Horatio Sharpe Joseph Shippen William Shirley John Stanwix Robert Stobo William Trent Conrad Weiser

These letters and papers include ten small volumes of letterbooks (1752-1781), and ca. 100 pieces of correspondence with Joseph Shippen (1750-1778). Topics discussed are business in Philadelphia and Lancaster, provincial politics, army supply in the French and Indian War, land purchases and speculation, housebuilding, and family affairs.