Link to the Image Source
Metropolitan Museum of Art

Artwork Details 

Title: John Adams
Dated: <Unknown>
Medium: Pastel on gray (now oxidized) laid paper
Dimensions: 9 1/2 x 7 7/16 in. (24.1 x 18.9 cm)
Location: Metropolitan Museum of Art
City, State: New York, NY
Notes:
Bequest of Marguerite H. Rohlfs