Timothy O'Sullivan took the Damless 1871 pic.
https://www.google.com/search?q=Cathedral+Mesa,+Colorado+River,+Arizona,+1871.+(Timothy+O%27Sullivan/Library+of+Congress)&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwig1un87sTPAhUGRSYKHdjdB-AQsAQIPw&biw=1366&bih=635