"Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo." 

- Abraham Lincoln

This verbal enigma is the world's longest sentence that utilizes only one word, albeit differing definitions of the word, that makes complete grammatical and syntactical sense. I have always enjoyed its absurd simplicity, and would like to share it with you all. Hence, this puzzle.

The solution to this puzzle lies in the structure of the sentence and the definitions of each variation of the word "buffalo." Figure out what types of words they are, and you are on your way to discovering the coordinates for the cache! 

Ironically, or perhaps unironically, the final hide is not a bison tube.

You can validate your puzzle solution with certitude.