sentences:  Brower's Spring
  
  Brower's Spring is a spring in the Centennial Mountains of Montana that was marked by a surveyor in 1888 as the ultimate headwaters of the Missouri River and thus the fourth longest river in the world, the -long Mississippi-Missouri River.The spring is named for Jacob V. Brower who in 1896 declared it to be the source of the Missouri in his book published by the Pioneer Press titled "The Missouri river and its utmost source".