I know this post is ancient but in case anyone else needs the clarification...

Pickens is properly recognized in Holmes yet literally sits on the 4 corners of Yazoo, Holmes, Madison, and Attala counties... accessible via I55, Ms 432, or US 51... they had the only taco bell for 50 miles round until Yazoo City got one in the late 90s...

Vaughan (actual spellling) is in Yazoo ... where Casey Jones crashed his locomotive, The Cannonball Express... and home of Greg Harkins who hand makes rockin chairs that are given to all of our presidents ... strange but cool..