Your'e welcome,
Of interest is to google "Carlton Watkins" then go to history of Yosemite.....there are many photos on line Carlton took in Yosemite in the 1860's !!! 80 years before Adams. Using glass plates and ULF cameras (18 x 24 I believe), of interest is Carlton's "Entrance to Yosemite"
Adams did a beautiful rendition of this...maybe called Clearing Storm, one of my favorite Adams photographs, I have it on a brass quintet album cover (vinyl) ....it is interesting to see the same scene nearly 100 yrs later, by Adams!
Possibly, Adams was able to view these remarkable Carlton images. They are archived in Yosemite. Ansel's father in law was a painter and worked and sold his paintings in Yosemite.....
historical observations are not criticisms, it is often only after the passage of time that we can somewhat be able to place historical contributions and study influences on and by various artists...
Personally, It was upon viewing Adams photography in the late 60's while in college and doing 35mm street photography in Chicago, that I became interested in large format and Weston, O'Keefe, Stieglitz, et al. I do have original Adams prints in my home......I also wish I had one of those Weston Peppers or a Watkins, or a Rodchenko, Steichen, Atget, Riis, Hine, Evans, even Demachy, and on and on, all a place in history....not a saint among them.
Check out Carlton Watkins he is the pioneer photographer of a pristine Yosemite.
Cheers
Dave in Vegas