A bird's-eye view of Perry's (later Green's) Brunswick Dock at Blackwall (built 1789 to 1790) looking down the Thames towards Woolwich with the tip of Greenwich Marsh (Blackwall Point), to the right. In the right foreground of this industrial scene is the Perry shipyard, with the distinctive Blackwall masting house, surrounded by piles of timber. Two men can be seen working the crane on the top of the building. Horses are used to move the timber, the main material used in shipbuilding. There are East Indiamen moored up in lines to the left and centre in the nearer part of the dock, many only partly rigged. The further part of the dock (both parts having separate entrances) holds smaller ships. The river is depicted as the principal highway and is busier than the road, with many Thames and coastal craft, and larger shipping. To the left of the tree-lined road, cows are shown grazing and the mouth of the River Lee, running into the Thames, appears in the left background.