The contents are as follows: Notebook, 1802, of John Rennie: Skating match on London docks when frozen, limestone burnt at Limehouse, Tate's distillery at Thames Bank, Fen drainage, Elstone and Nicholson's mill at Wisbech, Rutt and Jameson's engine in London, Pont Cyssyltau aqueduct, Menai straits (MS.19875), folios 11v- 1 filmed backwards);

Notebook, 1803, of John Rennie: London docks, Kennet and Avon canal, Portsmouth harbour, Chichester harbour, Dublin water supply (MS.19883);

Notebook, 1803, of John Rennie: Pile-driving machine at Woolwich, London docks, Thames and Medway canal, Royal canal, Bristol harbour (MS.19884);

Notebook, 1803, of John Rennie: Foss navigation, railways near Leeds, Lichfield water supply, mills at Islandbridge in Dublin, experiments at Limehouse rope-works, London docks (MS.19885);

Notebook, 1803, of John Rennie: Plymouth harbour, Kennet and Avon canal (MS.19886);

Notebook, 1803-1804, of John Rennie: Wisbech mill, Boston bridge, Dungeness light, seawall at Dymchurch, Croydon canal, London docks, Wandsworth mills (MS.19887);

Notebook, 1804, of John Rennie: Lea Bridge mills, Romney Marsh drainage and Royal Military canal, steam-engine for the Royal Mint, both in London and Birmingham, London docks, Claverton mill, Merton mill (MS.19888);

Notebook, 1804, of John Rennie: Chesterfield canal, Beverley drainage, Hull docks, Winteringham sea wall, Ancholme drainage (MS.19889);

Notebook, 1804, of John Rennie: Angles of windmill sails, London docks, Royal Military Canal, River Wey at New Haw, mills at Evesham, Pymore flax mill (MS.19890);

Notebook, 1808, of John Rennie: Soundings at Woolwich dock, experiments on a Woolf steam-engine at Meux's brewery, Fen drainage, Albury Park papermill (MS.19891);

Notebook, 1808, of John Rennie: Cranes for London docks, springs at Woolwich, Fen drainage, Margate harbour, London and Portsmouth canal (MS.19892).

Notebook, 1808, of John Rennie: Experiments in cutting copper bolts at Sheerness, undermining of the cliff at Reculver, Sheerness harbour, Portsmouth harbour, Manchester waterworks, Glasgow waterworks at Anderston (MS.19893);

Notebook, 1808, of John Rennie: Harbours at North Sunderland, Burntisland, Methil, Leven, and Anstruther, supply of stone in Fife, Dempster's patent canvas. Burn’s flaxmill at Dundee, Bell Rock light, Perth mills (MS.19894);

Notebook, 1808-1809, of John Rennie: Larne canal, North fleet cement mill, Ardglass harbour, wells at Ramsgate (MS.19895);

Notebook, 1809, of John Rennie: Deptford waterworks, bridges over Gunter's Ditch at Reading, tunnel at the Royal Mint, Devizes railway, Newport harbour (MS.19897);

Notebook, 1809, of John Rennie: Great Ouse bridges and sluices, Bedford river, Fen drainage, River Nene, mines at Beswick, Liverpool harbour, Kelso bridge (MS.19896);

Notebook, 1793, of surveys (not by John Rennie) for Winstanley's silk mill at Marlborough, and Walthamstow oil mill (MS.19929);

Notebook, 1786, of John Rennie: Diggin's mill at Chichester (MS.19903);

Notebook, 1786, of John Rennie: S D Liptrap and Company’s distillery, London (MS.19904);

Notebook, 1786, of John Rennie: Bell, Gosse and Company’s distillery, London (MS.19905);

Notebook, 1786, of John Rennie: Silas Deane's snuff and tobacco mill (MS.19906);

Notebook, 1787, of John Rennie: James Haig's distillery, Canonmills (MS.19907);

Notebook, 1787, of John Rennie: Aitchison and Brown's distillery, St Clements Wells (MS.19908);

Notebook, 1787, of John Rennie: J T Rutt's drug grinding mill (MS.19909);

Notebook, 1787, of John Rennie: Henry Goodwyn's brewery, London (MS.19910);

Notebook, 1788, of John Rennie: Hankins' cornmill at Ware (MS.19911);

Notebook, 1790, of John Rennie: Johnston and Gould's mill, Brentford (MS.19912);

Notebook, 1791, of John Rennie: Elgar's papermill, Chatford (MS.19913);

Notebook, 1794, of John Rennie: Severn's mill at Whitechapel (MS.19914);

Notebook, 1796, of John Rennie: King's brewhouse, and dock, at Gosport (MS.19915).