Bancroft's Tourist's Guide. Yosemite…
“ Nothing on wheels has ever gone up or down this tremendous precipice, and in only two places have 27 the surest-footed horses or mules been able to find a safe trail.Yosemite Valley is really a huge sink or cleft in a tangle of rock-mountains; a gigantic trough, not scooped or hollowed out from above, but sunk straight down, as if the bottom had dropped plumb toward the centre, leaving both walls so high that if either should fall, its top would reach clear across the valley and crash against the opposite cliff several hundred feet above its base. ”
