A FINE PAIR OF BLUE AND WHITE POWDER-BLUE-GROUND ROULEAU VASES, each painted around the cylindrical body with four foliate cartouches variously depicting two sages crossing a bridge in a mountainous riverscape, a phoenix perched on rockwork, a vase of chrysanthemum among precious emblems and two butterflies in flight amongst peony, the shoulder with four small ogival cartouches beneath the cup-shaped rim (slightly fritted), Kangxi