The contents are as follows: Notebook, 1801, of John Rennie: Grand Trunk canal, Peak Forest canal, inclined plane at Chapel-en-le-Frith, lime burning at Preston and Chester, cost of stone at Lancaster, navigation of the river Douglas at Tarleton, Standish colliery horse gin, Harecastle new furnace, limekilns at Clough, Leek canal, Wolseley bridge, Caldon canal, Uttexeter canal (MS.19871);

Notebook, 1801, of John Rennie: Croydon canal, Grand Surrey canal, weir at Blairdrummond, Menai straits, Conway river crossing, Perth harbour (MS.19872);

Notebook, 1801, of John Rennie: Harbours of Greenock, Portpatrick, and Chichester, Invermore mill, Larne mill, Menai straits, Swilly bridge, Llanrwst bridge (MS.19873);

Notebook, 1801, of John Rennie: Deptford waterworks, lock at Wapping, engine for Koops and Company's papermill, Chirk aqueduct, Dublin harbour (MS.19874);

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);

Notebook, 1802, of John Rennie: Witham navigation, Fen drainage, Division point at Drayton, Bramah's sugar press, Hermitage dock at London, Staines bridge, Koops and Company's Neckinger mill, experiments on the breaking strains of iron rails, warehouse for West India dock (MS.19876);

Notebook, 1802, of John Rennie: Gravesend tunnel, Stacey and Wise's steam-engine at Maidstone, Medway and Rother canal, Teise navigation, London dock, Croydon canal, Huddart's rope works, Glenkens canal (MS.19877);

Notebook, 1802, of John Rennie: Goodwyn and Company's steam-engine, Gravesend tunnel, New river, London docks, London and Portsmouth canal, reservoirs for Grand Junction canal (MS.19878);

Notebook, 1802, of John Rennie: Hull dock, Ancholme navigation, Fen drainage, Witham navigation, Foss navigation (MS.19879);

Notebook, 1802, of John Rennie: River Witham at Lincoln, Foss navigation, Saxilby swing bridge (MS.19880);

Notebook, 1802, of John Rennie: Waterworks at Kidbrook for Charles Abbot MP, Dover town mill and harbour, Kent canal, Torksey lock, Lough Owel, Royal canal (MS.19881);

Notebook, 1802-1803, of John Rennie: London docks, sugar milling, Wolseley bridge, Stretton bridge, Radford bridge, Darlaston bridge, pile-driving engine at Wisbech, Handfordbridge, Conway crossing, Boston bridge, Fen drainage, Musselburgh bridge, Teviot bridge (MS.19882);

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).