19th c French school portrait of a gentleman

Still sitting in it's original frame, this 19th century French portrait in pastel is of  Dieudonne Gelly (1848-1916) and was completed when he was 18 years of age.   Original frame, glazed. 

Measuring: (frame) 82.5cm h x 68.5cm w by 7cm deep

French, c. 1866