Abraham Trembley and pupils collecting hydra Isleworth View of a sweep crossing

View of a sweep crossing in front of Blackfriars Bridge

they could be used to check the running rate of astronomical clocks known as regulators

View of the Tower from the north-west with the Royal Mint in the distance and figures in the foreground

With key in the bottom margin

Interior view of Lollards Prison in Lambeth Palace

Abraham Trembley and pupils collecting hydra Isleworth View of a sweep crossingLandscape view showing the naturalist Abraham Trembley collecting specimens from a moat or canal, using a net. His two pupils, the sons of Count Willem Bentinck (1704 1774) sit beside him with a dog behind. The water feature is within a waled and tree lined garden at Zorgvlied near the Hague in the Netherlands. Vignette from Memoires pour server a l'histoire d'un genre de polypes d'eau douce by Abraham Trembley (Leiden, 1744), p. 149. The plate is