I was given an old pamphlet/book last night titled "Mount Rainier National Park" put out by the Department of Interior. The publication date is 1934.
excerpt: "It must be recognized that rock and ice climbing on any high mountain is a hazardous undertaking. Owing to the nature of thtrip to the summit of Mount Rainier, all climbers are required, as a safety precaustion, to register with the district park ranger before starting. They are also required to present satisfactory evidence of their physical ablility to withstand the hardships of such a trip, and that they have sufficient knowledge and experience in similiar hazardous climbing, and that they have all the proper equipment to insure reasonable chances of success."
It is also interesting to note the number of cabins and fire lookouts there were back then.