Three overlay decorated glass snuff bottles

Three overlay decorated glass snuff bottles
19th century
Including two ovoid form bottles, one in transparent brown shade, the other of clear color, each with applied opaque yellow overlay, carved with a writhing chilong to the main sides; the third a Yangzhou School milky-white bottle, thinly applied with four-color overlays, carved with a fisherman in a boat and another figure crossing a bridge over a lake, one side with a four-character inscription reading 'chun ri jing he' (a fine and harmonious spring day).
2 1/4 and 2 5/8in (5.7 and 6.7cm) high