The contents are as follows. (i) Barclay and Perkins Brewery, estimates and valuations, 1805-1807, 1809, 1813-1816, with a note of all payments made by the brewery to John Ronnie and Sons, from 1794 to 1831 (folio 1); (ii) Billinge's Silk Mill, Twyford, drawings and notes, 1799 (folio 25); (iii) The Earl of Bridgewater's threshing machine at Home Farm, Ashridge, 1811-1813 (folio 31); (iv) Cement mill at Loftus, Yorkshire, letters, 1811 (folio 58); (v) Claverton Mill, plan of water levels, 1806 (folio 61); (vi) Coulson and Company's mill, Limehouse, drawing and letters, 1810 (folio 63); (vii) Fermoy Brewery, letters and drawing, 1811, 1814-1816 (folio 70); (viii) Iver cottonmill, plan of lead, undated (folio 104); (ix) Kirkstall, letters, 1811, 1817 (folio 106); (x) Pymore flaxmill, letters, 1805-1806 (folio 110); (xi) Rotherhithe, King's Mills, report and measurement, circa 1799 (folio 152); (xii) Rundell's, Mill, Brick Lane, letters, 1812-1813 (folio 136); (xiii) Whatman's paper mills, Maidstone, notes, 1787 (folio 146); (xiv) Miscellaneous plans and calculations relating to mills, undated (folio 148); (xv) Petitions, minutes, and other papers concerning the pay and conditions of journey men mill-rights, 1805, 1814 (folio 179).