May 10, 1910: Jack Johnson starts training for his Fourth of July fight with Jim Jeffries by going 12 miles in the morning and an additional five in the afternoon.

“Newspaper men present at the taking of pictures of Jack Johnson today had their first opportunity of seeing the champion stripped to his fighting trunks and there were no adverse criticisms of his condition. If anything, sporting experts thought Johnson might safely carry more weight than he possesses in view of the time he has in which to train. Naturally, there is some extra weight about the stomach, but not as much as expected,” The Times says.