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Figures are loosely and rapidly indicated here, presumably observed inside the marquee erected over the coffer-dam around the site of the southernmost pier of the new London Bridge, for the foundation stone ceremony held on the riverbed on 15 June 1825. The slight indication of a rectangular form may mark the stone itself.
This is the last of a sequence of hurried sketches, apparently made in the course of the ceremony, working backwards through the book from folio 78 verso (D18818). The event and other studies relating to it at the beginning and end of this sketchbook are discussed in the Introduction.