One of the Brooklyn's passengers in later years became a leader in the settlement of Mesa, Arizona. He was Geo. W. Sirrine, a millwright, whose history has been preserved by a son, Warren L. Sirrine of Mesa. The elder Sirrine was married on the ship, of which and its voyage he left many interesting tales, one being of a drift to the southward on beating around Cape Horn, till icebergs loomed and the men had to be detailed to the task of beating the rigging with clubs to rid it of ice. When danger threatened there was resort to prayer, but work soon followed as the passengers bore a hand with the crew.
Sirrine, who had had police experience in the East, was of large assistance to Brannan in San Francisco, where the rougher element for a time seized control, taking property at will and shooting down all who might disagree with their sway. It was he who arrested Jack Powers, leader of the outlaws, in a meeting that was being addressed by Brannan, and who helped in the provision of evidence under which the naval authorities eliminated over fifty of the desperados, some of them shipping on the war vessels in port. Some of the Mormons still had a part of their passage money unpaid and these promptly proceeded to find employment to satisfy their debt. The pilgrims' loyalty appears to have been of the highest. They had purchased arms in Honolulu and had had some drill on the passage thence. At least on one occasion, they rallied in San Francisco when alarm sounded that hostile Mexicans might attack.
According to Eldridge, historian of San Francisco:
"The landing of the Mormons more than doubled the population of Yerba Buena. They camped for a time on the beach and the vacant lots, then some went to the Marin forests to work as lumbermen, some were housed in the old Mission buildings and others in Richardson's Casa Grande (big house) on Dupont Street. They were honest and industrious people and all sought work wherever they could find it."
Brannan's Hope of Pacific Empire
A party of twenty pioneers was sent over to the San Joaquin Valley, to found the settlement of New Hope, or Stanislaus City, on the lower Stanislaus River, but the greater number for a while remained on the bay, making San Francisco, according to Bancroft, "for a time very largely a Mormon town. All bear witness to the orderly and moral conduct of the Saints, both on land and sea. They were honest and industrious citizens, even if clannish and peculiar." There was some complaint against Brannan, charged with working the Church membership for his own personal benefit.
New Hope had development that comprised a log house, a sawmill and the cultivation of eighty acres of land. It was abandoned in the fall, after word had been received that the main body of the Saints, traveling overland, would settle in the valley of the Great Salt Lake. Brannan pushed with vigor his idea that the proper location would be in California. He started eastward to present this argument and met the western migration at Green River in July, and unsuccessfully argued with Brigham Young, returning with the vanguard as far as Salt Lake. His return to San Francisco was in September, on his way there being encounter with several parties from the Mormon Battalion, to them Brannan communicating rather gloomy ideas concerning the new site of Zion.
It is one of the many remarkable evidences of the strength of the Mormon religious spirit that only 45 adults of the Brooklyn party, with their children, remained in California, even after the discovery of gold. The others made their way across the Sierra Nevadas and the deserts, to join their people in the intermountain valley. A few were cut off from the Church. These included Brannan, who gathered large wealth, but who died, poor, in Mexico, in 1889.
There might be speculation over what would have been the fate of the Mormon Church had Brannan's idea prevailed and the tide of the Nauvoo exodus continued to California. Probably the individual pilgrims thereby might have amassed worldly wealth. Possibly there might have been established in the California valleys even richer Mormon settlements than those that now dot the map of the intermountain region. But that such a course would have been relatively disruptive of the basic plans of the leaders there can be no doubt, and it is also without doubt that under a condition of greater material wealth there would have been diminished spiritual interest.
Possibly even better was the grasp upon the people shown in Utah at the time of the passage of the California emigrants, in trains of hypnotized groups all crazed by lust for the gold assumed to be in California for the gathering. The Mormons sold them provisions and helped them on their way, yet added few to their numbers.