The Summer Battle at Hakone, c. 1874, Tsukioka Yoshitoshi, Japanese, 1839 - 1892, 13 5/8 ¡Ñ 28 7/16 in. (34.61 ¡Ñ 72.23 cm) (sheet, vertical ?ban triptych), Preparatory drawing for a print; ink and color on paper, Japan, 19th century, This drawing is for a triptych that was never published. The initial sketch was executed with red ink, and then later Yoshitoshi drew over it with black. He authenticated this drawing by putting his seals in red at the left and right margins, suggesting that this particular one was important to him.