suffered a rather nominal blockade of about four weeks. That period ended on the eighth of November, and for almost three months no American vessel appeared there.[1]
In February and March, 1847, the Portsmouth watched the port for about five weeks, but then it was left wide open again. England refused to recognize such a blockade. The United States admitted its illegality; 
and on the sixth of March, 1847, Commodore Biddle, now commanding the squadron, cancelled Stockton's proclamation. During the spring of 1847 Mazatlán, which had almost a monopoly of the commerce, was again blockaded for a time, and after May the summer hurricanes interdicted commerce. Since Mexico had no armed vessel of any importance in the Pacific, naval operations then became unnecessary.[2]
In July, 1847, Shubrick succeeded Biddle. As the blockade of Mazatlán had been raised, he issued on August 6 a fresh notice, covering that port, Guaymas and San Bias, and about the middle of October sailed from Monterey, California, in the Independence, accompanied by the Cyane. The rest of his active squadron—which had preceded him southward or was to join him in that quarter—consisted of the Congress, Portsmouth, Preble, Dale and two storeships. On the twenty-ninth near Cape San Lucas he met Lavallette in the Congress, and learned that after an hour's cannonading—caused by the disobliging refusal of General Campusano to surrender—Guaymas had been occupied nine days before. November 10 mountains lighted by a declining sun and canopied by a turquoise sky rose from the Gulf of California before him on the east; and soon, approaching a long, curving line of white beach, he dropped anchor near the lioness-hill of Crestón Island, which crouched, grandly recumbent, with her fore paws extended, watching over two islet cubs that slept in front of her. Here, on the mainland, was Mazatlán.[3]
For nearly eighteen months the port, second only to Vera Cruz in the value of its commerce, had been controlled by
