Fig. 1. Topographic map of the apex of the
Big Bend, summer of 1921. Contour interval two
feet. Scale: 1 inch -200ooo feet. Reduced from
original base map offered in testimony in which
i inch = 500 feet.
Stippled area represents substantially bare
sand bed, or "sand flat," of river, which-except
for low, incipent islands-was covered with wa-
ter by every slight flood. Each such flood reduced
the whole river bed to quicksand and caused
greater or less change in the position of the low-
water channel at "normal" stage.
Texas State Historical Association. The Southwestern Historical Quarterly, Volume 66, July 1962 - April, 1963. Austin, Texas. The Portal to Texas History. http://texashistory.unt.edu/ark:/67531/metapth101196/. Accessed October 10, 2015.