More to explore:
Messenger Boy with his bicycle (and cigar), Waco, Texas 1913
Lewis Hine: Messenger boy for Mackay Telegraph Co., Waco, Texas, 1913
Vintage photo boy with bike
Photojournalist Lewis Hine's badass bike messenger kid
Lewis Hine photographer, capturing "Vaudeville", a Gilded Age pastime.
One of the underprivileged, Hull House, Chicago 1910, by Lewis Wickes Hine
Lewis Hine, exposing child labour in the early 20th c. Do art that matters.
American children photographs by Lewis Hine
Disonancias: De peur que vienne l'oubli II - Child Labor by Lewis Wickes Hine
U.S. Child Miners, 1900s
Chicago Bike Messenger Look
Chicago bike messenger
20th century child - Google Search