Greek and Roman gods: the Muses. Clio 1; Euterpe 2; Thalia 3; Melpomene 4; Terpsichore 5; Erato 6; Polyhymnia 7; Urania 8 and Calliope 9. Handcoloured copperplate engraving from Bertuch's Bilderbuch fur Kinder (Picture Book for Children); Weimar; 1805. Friedrich Johann Bertuch (1747-1822) was a German publisher and man of arts most famous for his 12-volume encyclopedia for children illustrated with 1;200 engraved plates on natural history; science; costume; mythology; etc.; published from 1790-1830.