from the Dutch, and is said to have introduced engraving on copper. His ideas of perspective may be seen in his Gwa-to Sai-yu dan, a book of travels with woodcut illustrations, published in 1781 (British Museum
Fig. 26.–Gradation print from the Keisai so-gwa, by Keisai Yeisen (1832).
Collection). The book-illustrators and scene-painters from about the same time began to adopt perspective, but used or neglected it in a