I found a book of Jacques Henri Lartigues‘ photographs at Strand Book Store for a couple of bucks and and was instantly drawn to the images inside. Supposedly these photos from his childhood/teens were hidden away in extensive journals until he was 69. He then went on to have a major retrospective at MOMA. Here’s what Wikipedia says about him:
Born in Courbevoie to a wealthy family, he started taking photographs when he was 7, his subject matter being primarily his own life and the people and activities in it. As a child he photographed his friends and family at play – running and jumping, racing wheeled soap boxes, building kites, gliders and aeroplanes, and climbing the Eiffel Tower. He also photographed many famous sporting events, including automobile races such as the Coupe Gordon Bennett and the French Grand Prix, early flights by aviation pioneers including Gabriel Voisin, Louis Blériot, Louis Paulhan and Roland Garros, and the tennis player Suzanne Lenglen at the French Open tennis championships.