John Singer Sargent studied under French art instructor and painter Carolus-Duran (Charles Auguste Émile Duran, 1837-1917). Sargent’s signature brushwork was developed during his time in Paris with Carolus-Duran.
The lovely portrait of Carolus-Duran Sargent painted of his mentor in 1879 (featuring that signature brushwork and the above pictured facial hair) can be found at the Clark Art Institute in Williamstown, MA.
More on Mustaches of the 19th-Century.
Jennifer Snyder works with oral history interviews at the Archives American Art. When not sending interviews out for digitization, she is writing about extraordinary examples of facial hair for this blog.