Now that Vera Cruz had fallen and General Scott's plans called for a movement toward the interior, it was most desirable for him to have better cavalry. But he lacked horses. Singular as it may seem, he called upon the navy to assist in supplying this deficiency. It was known that there were Mexican horsemen in and about Alvarado, so it was determined to proceed against this place by land and sea, so that the town could be reduced, and the horses secured at the same time. General Quitman, with a brigade, was sent by land, so as to keep the horsemen from running away, while the "Potomac," Captain Aulick, and the "Scourge," Lieutenant Charles G. Hunter, were sent to appear in front of Alvarado. It was evidently intended that Captain Aulick and General Quitman would move on the place on some appointed day. Lieutenant Hunter did not know what the plans were, and as his boat was much faster than the "Potomac" he arrived in front of Alvarado long before Captain Aulick. When the "Potomac" did come in sight, a great commotion was noticed in the harbor. The "Albany," which had been doing blockading service, came out and informed Captain Aulick that Alvarado had been taken. "By whom?" asked the Captain. "By Lieutenant Hunter, in the 'Scourge,'" was the reply. The "Scourge," it should be explained, was a very small steamer, carrying one gun and forty men. Hunter went up pretty close and observing indications of flinching, he fired three guns and dashed boldly in and captured the place. The horsemen, the capture of whom was the main object of the expedition, were frightened off before General Quitman could intercept them. Having taken possession of Alvarado, Lieutenant Hunter placed in the town a garrison consisting of a midshipman and two men, and hurried his steamer up the river to a place called Tlacotalpan, which he also captured. When General Quitman arrived in Alvarado with his brigade and the place was gravely handed over to him by Passed Midshipman William G. Temple (afterward a very distinguished officer of high rank) he was greatly amused and laughed heartily. But Commodore Perry was annoyed and angry. As soon as he could get hold of Hunter--not an easy matter, as Hunter had gone on his conquering way still further up the river with the intention of taking all the rest of Mexico not subjugated by Taylor and Scott--he placed him under arrest and preferred charges against him. When Hunter was shortly tried by court-martial, he was sentenced to be reprimanded by the Commodore, the reprimand to be read from the quarter-deck of every vessel in the squadron.