A Canton ivory brise fan with monogram L.B., carved and pierced with figures and pagodas - 7in. (18cm.), circa 1830 - in fitted silk-covered box labelled Luenchun, Mother of pearl, Ivory and Tortoiseshell Carver, 6 New China Street, and inscribed Miss Mertens from her serious friend L. Bates 1835 and inscribed L.B. on base