Accordingly, the long boat was ordered with this midshipman and eight sailors, prepared with water and provisions for several days absence.  Biddle then asked me if I knew any of his own officers, and which one of them I would prefer to accompany me.  I knew most of them, and we settled down on Louis McLane.  He was sent for, and it was settled that McLane and I were to conduct this important mission, and the commodore enjoined on us complete secrecy, so as to insure success, and he especially cautioned us against being pumped by his ward-room officers, Chapman, Lewis, Wise, etc., while on board his ship.  With this injunction I was dismissed to the wardroom, where I found Chapman, Lewis, and Wise, dreadfully exercised at our profound secrecy.  The fact that McLane and I had been closeted with the commodore for an hour, that orders for the boat and stores had been made, that the chaplain and clerk had been sent out of the cabin, etc., etc., all excited their curiosity; but McLane and I kept our secret well.  The general impression was, that we had some knowledge about the fate of Captain Montgomery’s two sons and the crew that had been lost the year before.  In 1846 Captain Montgomery commanded at Yerba Buena, on board the St. Mary sloop-of-war, and he had a detachment of men stationed up at Sonoma.  Occasionally a boat was sent up with provisions or intelligence to them.  Montgomery had two sons on board his ship, one a midshipman, the other his secretary.  Having occasion to send some money up to Sonoma, he sent his two sons with a good boat and crew.  The boat started with a strong breeze and a very large sail, was watched from the deck until she was out of sight, and has never been heard of since.  There was, of coarse, much speculation as to their fate, some contending that the boat must have been capsized in San Pablo Bay, and that all were lost; others contending that the crew had murdered the officers for the money, and then escaped; but, so far as I know, not a man of that crew has ever been seen or heard of since.  When at last the boat was ready for us, we started, leaving all hands, save the commodore, impressed with the belief that we were going on some errand connected with the loss of the missing boat and crew of the St. Mary.  We sailed directly north, up the bay and across San Pablo, reached the month of Sonoma Creek about dark, and during the night worked up the creek some twelve miles by means of the tide, to a landing called the Embarcadero.  To maintain the secrecy which the commodore had enjoined on us, McLane and I agreed to keep up the delusion by pretending to be on a marketing expedition to pick up chickens, pigs, etc., for the mess of the Columbus, soon to depart for home.