Engraving, line, with etching: ... the New Invented Expedition Crane..., John Webb the Inventor. [dedicated to the Royal Society of Arts]. Isaac Taylor del. et sculpt. Published October 1764. Platemark 46.3x32.8cm on sheet 51x38cm. Crane pulley system powered by horse whin to move buckets up and down from coal barge 'Laying up coals in a Magazine, as Set forth by the Inventor in the Gazetteer April 16 1764'. In frame 65x51x2cm