The contents are as follows. (i) Aberdeen, letters, 1796, 1801 (folio 1); (ii) Aire and Calder, correspondence and papers, 1820-1821 (folio 4); (iii) Bath and Bristol, estimates and reports, 1796, 1803, undated (folio 71); (iv) Birmingham, report, 1808 (folio 88); (v) Chelmer and Blackwater, reports, 1793-1796 (folio 118); (vi) Colne, report by Thomas Telford, 1811 (folio 133). (vii) Crinan, correspondence, papers and reports, 1803-1804, 1816-1820 (folio 135); (viii) Dart, letters, 1806 (folio 233); (ix) Don, report, 1821 (folio 237); (x) Gloucester and Berkeley, printed report, 1811 (folio 239); (xi) Grand Junction, correspondence, reports, and drawing, 1794 (folio 240); (xii) Grand Trunk, letter, 1800 (folio 247); (xiii) Grand Western, report and letter, 1811, 1821 (folio 249); (xiv) High Peak Junction, reports (printed and draft), 1810 (folio 252); (xv) Huddersfield, letter, 1820 (folio 256).