Photograph of two oil miners working a city lot oil well, in Blackwell, OK, with a note that reads, "Oklahoma has another oil boom, this time a series of backyard oil wells drilled on city lots on the edge of the residential section of Blackwell. Two of the oil 'miners' are shown working their well, which is the smallest in the world. The wells come in at an average depth of only twenty-three feet from an oil sand eighteen inches deep. The wells are being drilled with post augers and pumped by hand with common farm pitcher pumps. The wells produce five to six barrels per day."

Photograph of Troops Guard End of Bridge in Oklahoma. Oklahoma Entrance to the Denison, TX-Durant, OK, Red River Toll Bridge Patrolled By Oklahoma National Guardsmen in Martial Law area ordered by Gov. W. H. Murray to prevent passage over the structure as result of row with Texas over the latter closing a parallel free bridge." - July 25, 1931 - (Top Photo)

Photograph of 'They Shall Not Pass' says W. W. Sterling, Adjutant General of Texas, in white trousers and holding a Winchester rifle 30-30. While on his left is Texas Ranger Captain Tom Hickman. They are keeping watch on the Denison-Durant free bridge over the Red River, to see that no Oklahoma motorist runs through the barricade. On Sterling's right are two more Texas rangers, L to R: J. P. Huddleston and W. H. Kirby. So far no blood at the bridge on the Texas side." July 20, 1931. - Photo credit: International Chicago.