Link to the Image Source
Metropolitan Museum of Art

Artwork Details 

Title: Mrs. John Montgomery (Sarah Diemer)
Dated: 1800
Medium: Watercolor on ivory
Dimensions: 3 7/16 x 2 3/4 in. (8.7 x 7 cm)
Location: Metropolitan Museum of Art
City, State: New York, NY
Notes:
Fletcher Fund, 1933