Hollis Taggart Galleries - John Henry Twachtman (1853–1902)
- Biography and sample painting for the late 19th century American Impressionists and participation in the Ten American Painters group.
- http://www.hollistaggart.com/artists/twachtman.htm

Wikipedia - John Henry Twachtman
- Brief biography of the American painter best-known for his impressionist landscapes.
- http://en.wikipedia.org/wiki/John_Henry_Twachtman

John Henry Twachtman
- Spanierman Gallery sponsors the John Henry Twachtman Catalogue Raisonné, the first complete reference source of all the work (excluding prints) of this important American Impressionist. Site features images of the artist's work and biographical informat
- http://www.johnhtwachtman.com//