Link to the Image Source
Metropolitan Museum of Art

Artwork Details 

Title: Mrs. Robert Watts (Matilda Ridley)
Dated: ca. 1810
Medium: Watercolor on ivory
Dimensions: Sight: 2 7/8 x 2 1/4 in. (7.3 x 5.7 cm)
Location: Metropolitan Museum of Art
City, State: New York, NY
Notes:
Amelia B. Lazarus Fund, 1915