A Survey of the RIVER THAMES from York Stairs to Westminster Horse Ferry shewing the Depths of Water at the common Ebbs w.th the Swing of the Tides
Surveyor: Mitchell, Captain John
Medium: Pen and ink on paper
The title of this map appears at top centre, with an explanatory note at top right and scale bar at bottom left. Intended as an aide for navigation along the river, the map shows the depth of the water in feet. Arrows pointing downstream indicate the first quarter ebb and arrows pointing upstream the last quarter ebb, with the deepest channel indicated by a dotted line.