Primal Solitudes.

But a sketch of Marin, however cursory, would be incomplete without her southern isle, for besides the United States Barracks, situated on the western part of the Island, there is located in a northern cove the Federal quarantine station, that most necessary adjunct of San Francisco, which prevents contagion by quenching the pestilence often brought to our shores from the Orient and South American ports.

Besides its present significance the Island has another and far older claim on our attention.

In the summer of 1775, Juan de Ayala, a lieutenant of the Royal Spanish Navy, was given a commission from Junipero Serra and Bucareli, the Mexican Viceroy, to proceed to "the arm of the sea" lying north of Monterey, which had been twice viewed by the padres from the land, to ascertain if it were a canal or bay, and make a survey of it.

Pursuant to these instructions Ayala cautiously crept up the Coast and on the ninth day sighted the narrow passage which is now known the world over as the Golden Gate.

In the Canyon.