Up to the time of Farragut's departure for the North, in August, 1863, the blockade of the Gulf sea-coast within the limits of his command, though technically effective, had for the most part only been enforced by the usual method of cruising or anchoring off the entrances of the ports. Such a watch, however, is a very imperfect substitute for the iron yoke that is imposed by holding all the principal harbors, the gateways for communication with the outer world. This was clearly enough realized; and the purpose of Farragut, as of his Government, had been so to occupy the ports within his district. At one time, in December, 1862, he was able to say exultingly that he did so hold the whole coast, except Mobile; but the disasters at Galveston and Sabine Pass quickly intervened, and those ports remained thenceforth in the hands of the enemy. On the Texas coast, however, blockade-running properly so called--the entrance, that is, of blockaded Confederate harbors--was a small matter compared with the flourishing contraband trade carried on through the Mexican port Matamoras and across the Rio Grande. When Farragut's lieutenant, Commodore Henry H. Bell, visited this remote and ordinarily deserted spot in May, 1863, he counted sixty-eight sails at anchor in the offing and a forest of smaller craft inside the river, some of which were occupied in loading and unloading the outside shipping; to such proportions had grown the trade of a town which neither possessed a harbor nor a back country capable of sustaining such a traffic. Under proper precautions by the parties engaged, this, though clearly hostile, was difficult to touch; but it also became of comparatively little importance when the Mississippi fell.