Envelope reads "Hetch Hetchy Mitchell tunnel explosion 7/17/30." Phogograph shows three men standing in front of some sort of wooden scaffold structure. They wear hats and long sleeved shirts and pants. The man on the left has his right hand on his hip, and the other two have their left hands on their hips. This photograph was printed in the Oakland Tribune on July 17, 1930 (p3) with the caption "Charles O'Malley, 'top man', life saved by three minutes: J. B. controy, who aided Davis in rescue work: and Richard Malacrida, another of the rescued." For more inormation about the Mitchell Tunnel see h99.1.482.