The first mention made of the Indians in Marin County is found in an old legend which states that about the time of the erection of the Mission at San Francisco a party of Spaniards crossed the Straits at what is now known as Lime Point and traveled northward. It was late in the season, and they found no streams of running water until they arrived at Olompali, so named from a great and powerful tribe of Indians who dwelt at this place, the Olompalis. Here they were kindly received by the natives, and all their wants were supplied as far as it lay in their power. The party was so well entertained that the leaders decided to remain a fortnight and recruit their horses and become thoroughly rested, preparatory to proceeding on their arduous journey. In return for the kindness received, they taught the Indians how to make adobe brick and construct a house. That history corroborates this legend is shown in an old chronicle by the biographer of Junipero Serra, Father Palou, which says that "in 1776, after the Presidio and before the Mission (in San Francisco) were established, an exploration of the interior was organized as usual by sea (the bay), and land." Thus, in the northeast corner of the County, near Novato, was built the first adobe house north of San Francisco Bay, on the Olompali Rancho, owned by the late Dr. Burdell. [Illustration: Fourth Street, San Rafael.] The first adobe has long since disappeared, the last mention found of it being a remark of General Vallejo's when, some thirty years ago, on passing the Olompali Rancho and pointing to a crumbling adobe he remarked to a companion, "That is over a hundred years old." But the adobe that concerns us, the long, low, rambling adobe, is still standing in good condition and occupied by Dr. Burdell's family. This was supposedly the second built and is accredited to have been constructed by the last chief of the tribe, Camillo Ynitia. [Illustration: Entrance to Hotel Rafael.] Camillo, after obtaining three successive patents for the Rancho, first from Spain, then from Mexico, and lastly from the United States, sold it for five thousand dollars, which he was believed to have buried in the vicinity. Refusing to divide the proceeds of the Rancho, and furthermore to disclose the spot where the gold was buried, Camillo was subsequently murdered by his brother. [Illustration: Hotel Rafael.] The Olompali Rancho is beautifully situated, lying as it does at the base of Mt. Olompali which is believed to be an extinct volcano. [Illustration: The Late Owner of the Olompali.] Mortars found five feet under ground in the river bed, together with sand, mud, gravel, pebbles, and cement strata on the mountain side, testify to volcanic action. From this mountain which formerly, in unknown ages emitted hot, sulphuric gases from its bosom, now runs a clear and limpid stream, a perpetual penance to nature for the havoc it once wrought.