Panoramic engraving showing waterworks buildings, dam and locks, and riverbanks. There is a steamboat on the river, with a cabin and awning on its upper deck and two paddle wheels at the stern. "Drawn by T. Birch" on bottom left. "Engraved by R. Campbell" on bottom right.

Correspondence from Charles Mason and Jeremiah Dixon to Thomas Birch, and Nevil Maskelyne to Charles Mason, relating to the survey, and the transits of Venus (1761,1769).