From Open Culture:
In this rare footage from 1915 we see the 74-year-old master seated at his easel, applying paint to a canvas while his youngest son Claude, 14, stands by to arrange the palette and place the brush in his father’s permanently clenched hand. By the time the film was made Renoir could no longer walk, even with crutches. He depended on others to move him around in a wheelchair. His assistants would scroll large canvases across a custom-made easel, so that the seated painter could reach different areas with his limited arm movements. But there were times when the pain was so bad he was essentially paralyzed.