There is not much written about Winslow Wetherill or his activities in the Southwest. He was loosely considered the Black Sheep of the Wetherill family and the family marksmen. His son Milton Wetherill followed family tradition and was a distinguished archeologists at the Museum of Northern Arizona.
The Tiz-Nat Zin Trading Post was built by "Old Man Swires" in 1878, bought by the Hyde Exploring Expedition in 1900 and run by Winslow Wetherill until 1902. Richard Wetherill stopped here on his first exploration trip to Chaco Canyon in 1895 while guiding theWinslow also purchased the Two Grey Hills Trading Post in 1902 and sold it in 1904. The two Grey Hills Trading Post is still in business today in the same location 11 miles east of Newcomb on the Toadlena road (three and a half miles south of Navajo Route 19.
Two Grey Hills Trading Post Established 1897

1870-1939
Palentology report that describes the Tiz-Nat-Zin Trading Post in detail.
This is a very large file so may take several minutes to download. The
report by Donald Wolberg and Diane Bellis of the New Mexico Bureau of Mines
describes the history of the Bisti Badlands and the eight Wetherill/Hyde
trading posts as well as coal deposits and fossil remains in the area.