The contents are as follows:
Correspondence, 1812-1817, 1820-1821, of John Rennie concerning Plymouth harbour (MS.19799);
Reports, estimates, and plans, 1806, 1811-1812, 1820, of John Rennie concerning Plymouth harbour (MS.19800);
Notebooks, 1806, 1812, of John Rennie of observations made at Plymouth harbour (MS.19801-19802);
Papers, 1782-1821, of John Rennie concerning harbours in places beginning with Po-Se (MS.19803).