In the mid-19th century, Cornwall developed a reputation as a health retreat. Until the early 20th century, city folk flocked to the valley to experience the therapeutic powers they believed it to hold. The mountains, fresh air and evergreen forests were thought to offer the perfect conditions for good health and they were not far from the city. Cornwall, on the west side of the Hudson, became especially popular as a health retreat, offering numerous boarding houses and many conveniences of the day, including accessibility to the railroad and steamboats, as well as a telegraph office and large library.