Old Map of the River Thames – Source to Sea

Bowles’s Thames: Mapping England’s Great Commercial River

This extraordinary map was published under the full title Bowles’s Draught of the River Thames, from its Spring in Gloucester-Shire, to its Influx into the Sea. The first issue was published on 1 January 1774 and the plate was corrected in 1793. It was drawn and engraved by John Ellis and printed for Carington Bowles at his Map and Print Warehouse, No. 69 St Paul’s Churchyard, London. Its purpose is stated plainly in the remainder of the title: the map includes a table of the locks, weirs and bridges on the river, the tolls payable at each and their distances from one another by water.

Carington Bowles was one of the most active British map and print publishers of the Georgian period. Born in 1724 into an established family of London printsellers, he worked first with his father before taking over his uncle Thomas Bowles’s business at St Paul’s Churchyard. From there he issued maps, atlases, views, portraits and popular prints for a wide public. John Ellis, active during the second half of the eighteenth century, supplied the cartography and engraving for this ambitious portrait of England’s best-known river.

Rather than confining the Thames to the shape it occupies on a conventional map of southern England, Ellis allows the waterway to command the composition. The river is followed continuously from its upper reaches in Gloucestershire, through Oxfordshire and Berkshire, past the settlements and landing places of the Thames Valley, into London and finally through the estuary to the sea. The resulting panoramic design conveys both the great length of the river and the remarkable variety of landscapes, towns and commercial centres connected by it.

The map appeared at a particularly important moment in the history of Thames navigation. Boats had been able to reach Oxford for centuries, but responsibility for maintaining the upper river was fragmented and passage could be slow and difficult. An Act of Parliament passed in 1771 strengthened the navigation commissioners, divided the river above Staines into five districts and gave wider powers to improve the channel. Eight new pound locks followed. Bowles’s map, published only three years later, belongs directly to this period of organised improvement and growing commercial use.

Its detailed table made the engraving more than a decorative panorama. Locks, weirs—spelled “wears” in the original title—and bridges were practical obstacles or stopping points for anyone moving goods along the river. The stated tolls revealed the cost of passage, while distances measured by water allowed merchants, barge owners and travellers to estimate a journey more realistically than ordinary road mileage could. The map therefore records the Thames not simply as a geographical feature but as a working transport system.

Along the upper and middle river, the course passes places including Lechlade, Oxford, Abingdon, Wallingford, Reading, Henley, Marlow and Windsor. These towns depended upon the Thames for trade and communication, with barges carrying heavy and bulky cargoes that were costly to move overland. Approaching the capital, the river becomes increasingly urban and commercial. London’s wharves and riverside districts formed the centre of a network through which goods moved between inland England, the metropolis and overseas markets.

Below London, the character of the map changes again as the river widens into its tidal estuary. Channels, shoals, sandbanks and navigational information become increasingly important as the Thames approaches the North Sea. This transition—from rural headwaters to inland navigation, then metropolitan highway and maritime gateway—is one of the map’s most compelling qualities. Few historic maps show so clearly how a single river could bind together countryside, market towns, the capital and international trade.

The corrected 1793 state was issued in the final year of Carington Bowles’s life. It preserves a view of the Thames on the threshold of the great industrial and transport changes of the nineteenth century. Today the map rewards close inspection for its place names and practical detail, but its exceptional panoramic form also makes it a striking work of graphic design: the story of England’s most famous river told continuously from source to sea.