A self-portrait by Huguette Clark, unsigned, c. 1928.

Huguette Clark's paintbrush case and palette, shown with her self-portrait at Christie's in New York in 2014.

Huguette Clark as an artist, painted by her instructor, Tadé Styka, in a black-and-white photograph of the painting.

Tadé Styka, Huguette Clark's painting instructor.

The "Rough Rider" painting of Teddy Roosevelt by Tadé Styka, Huguette Clark's painting instructor and the Clarks' favorite portrait artist.

President Truman and Tadé Styka look at Styka's portrait of the president, in a photograph from the Truman Library. Styka was Huguette Clark's painting instructor.

Wanda Styka, the daughter of Huguette Clark's painting instructor became Huguette's goddaughter, writing to her for decades though they last were in the same room when Wanda was a child.