London Stereoscopic Company / Wikipedia

John Stuart Mill: A portrait from about 1870

Philosopher John Stuart Mill poses for a photograph, circa 1870. Mill was born in 1806, so he would have been around 64 years old when this photo was taken. (He died in 1873.)

The photo, from the Fulton Archive and by the London Stereoscopic Company, is now in the public domain and is shared here via Wikimedia Commons.