The reknowned naturalist and author John Muir was not a full-time paleontologist but he was the first person to collect fossils in the Petrified Forest, and in fact it was his small collection that later spurred the more intensive work of Camp and Alexander. Muir spent much of 1905 and the beginning of 1906 at the small railroad stop of Adamana which at the time was the gateway to the Petrified Forest. Muir was there to write a series of articles on the Petrified Forest (never completed). His daughters Helen and Wanda were with him and a major reason they were in Arizona was to experience the dry desert air for Wanda's health. Muir and his daughters took numerous photographs of their visit and these are among the earliest known photos of Adamana and the park. A major set back for Muir during his time here was the death of his wife Louisa in early August, 1905 but he later returned to the area with his daughters. I have posted some of the photos below. These are courtesy of the National Park Service.
Photo of Muir's tent in the snow at Adamana in December of 1905. Note Muir's hand labelling of the photo.
Back in the day, everyone had to get their picture taken on Agate Bridge. This is a petrified log spanning a large gully and is still intact today (thanks to the help of some concrete that the railroad put in before 1920 as they were afraid of losing one of their major attractions. Today, visitors are not allowed to stand on the span.
Muir studying a petrified log.
Muir and a group studying a log in Jasper Forest (historically called the First Forest).
Another shot from Jasper Forest.