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).