609547 Advert for an appearance by Mr Zacharias Dase (engraving) by English School, (19th century); Private Collection; (add.info.: Advert for an appearance by Mr Zacharias Dase, mathematical prodigy whose feats of memory include the remembering strings of up to 12 numbers and increasing that number to upwards of 60 by multiplication; appearing at the Wellington Rooms, 8 Wellington Street, north Strand; London); Look and Learn / Peter Jackson Collection; English, out of copyright.