The city became a fashionable resort in the 1900s when health tourists arrived with conditions that required dry heat. Because of the heat, however, the population dropped markedly in the summer months. In 1906 naturalist and travel writer George Wharton James's two volume The Wonders of the Colorado Desert described Palm Springs as having great charms and attractiveness: and included an account of his stay at Murray's hotel. As James also described, Palm Springs was more comfortable in its microclimate because the area was covered in the shadow of Mount San Jacinto to the west and in the winter the mountains block cold winds from the San Gorgonio pass. Early illustrious visitors included John Muir and his daughters, U.S. Vice President Charles Fairbanks, and Fanny Stevenson, widow of Robert Louis Stevenson; still, Murray's hotel was closed in 1909 and torn down in 1954.: