A PAIR OF GILT-DECORATED MIRROR BLACK-GLAZED CYLINDRICAL VASES decorated in gilt with a bird amongst peony above a band of lappets around the foot, the sloping shoulder with floral cartouches reserved on a cell-pattern ground, the tall necks with a butterfly in flight above flower-sprays and the cup-shaped rims with a band of key-pattern, Kangxi six-character marks, 19th Century