The Lady of the Seashells?

Sold for £90,000 as part of the November 15 Natural History & Travel sale at Sotheby’s was an album of 162 conchological watercolours put together c.1764-82 by Mlle. J.C. Xavery, a miniaturist of Dutch descent and probably the sister of the flower and landscape painter Jacob Xavery, who was working in Paris around the same time.