John Muir on George Anderson's ascent of Half Dome:
Mr. Anderson began with Conway's old rope, part of which still remains in place, and resolutely drilled his way to the top, inserting eyebolts five or six feet apart, and making his rope fast to each in succession, resting his foot on the last bolt while he drilled for the next above. Occasionally some irregularity in the curve or slight foothold would enable him to climb fifteen or twenty feet independently of the rope, which he would pass and begin drilling again, the whole being accomplished in a few days. From this slender beginning he will now proceed to construct a substantial stairway which he hopes to complete in time for next year's travel; and as he is a man of rare energy the thing will surely be done. Then, all may sing "Excelsior" in perfect safety...
(c) A wilderness, in contrast with those areas where man and his own works dominate the landscape, is hereby recognized as an area where the earth and its community of life are untrammeled by man, where man himself is a visitor who does not remain. An area of wilderness is further defined to mean in this Act an area of undeveloped Federal land retaining its primeval character and influence, without permanent improvements or human habitation, which is protected and managed so as to preserve its natural conditions and which (1) generally appears to have been affected primarily by the forces of nature, with the imprint of man's work substantially unnoticeable; (2) has outstanding opportunities for solitude or a primitive and unconfined type of recreation; (3) has at least five thousand acres of land or is of sufficient size as to make practicable its preservation and use in an unimpaired condition; and (4) may also contain ecological, geological, or other features of scientific, educational, scenic, or historical value.
PROHIBITION OF CERTAIN USES
(c) Except as specifically provided for in this Act, and subject to existing private rights, there shall be no commercial enterprise and no permanent road within any wilderness area designated by this Act and, except as necessary to meet minimum requirements for the administration of the area for the purpose of this Act (including measures required in emergencies involving the health and safety of persons within the area), there shall be no temporary road, no use of motor vehicles, motorized equipment or motorboats, no landing of aircraft, no other form of mechanical transport, and no structure or installation within any such area.