Where the San Leandro turnpike stretches its dusty, hot, and interminable length along the valley, at a point where the heat and dust have become intolerable, the monotonous expanse of wild oats on either side illimitable, and the distant horizon apparently remoter than ever, it suddenly slips between a stunted thicket or hedge of "scrub oaks," which until that moment had been undistinguishable above the long, misty, quivering level of the grain.

The thicket rising gradually in height, but with a regular slope whose gradient had been determined by centuries of western trade winds, presently becomes a fair wood of live-oak, and a few hundred yards further at last assumes the aspect of a primeval forest.

A delicious coolness fills the air; the long, shadowy aisles greet the aching eye with a soothing twilight; the murmur of unseen brooks is heard, and, by a strange irony, the enormous, widely-spaced stacks of wild oats are replaced by a carpet of tiny-leaved mosses and chickweed at the roots of trees, and the minutest clover in more open spaces.

The baked and cracked adobe soil of the now vanished plains is exchanged for a heavy red mineral dust and gravel, rocks and boulders make their appearance, and at times the road is crossed by the white veins of quartz.

It is still the San Leandro turnpike,--a few miles later to rise from this canada into the upper plains again,--but it is also the actual gateway and avenue to the Robles Rancho.