The Texans now advanced along the Santa Fe Trail, beyond the sand hills south of the Arkansas, when they discovered that a party of Mexicans had passed toward the river. They soon came upon them, and a skirmish ensuing, eighteen Mexicans were killed, and as many wounded, five of whom afterward died. The Texans suffered no injury, though the Mexicans were a hundred in number. The rest were all taken prisoners except two, who escaped and bore the news to General Armijo, who was encamped with a large force at Cold Spring, one hundred and forty miles beyond. Kit Carson figured conspicuously in this fight, or, rather, immediately afterward. His recital differs somewhat from Gregg's account, but the stories substantially agree. Kit said that in April, previously to the assault upon Armijo's caravan, he had hired out as hunter to Bent's and Colonel St. Vrain's train caravan, which was then making its annual tour eastwardly. When he arrived at the crossing of Walnut Creek,[22] he found the encampment of Captain Philip St. George Cooke, of the United States army, who had been detailed with his command to escort the caravans to the New Mexican boundary. His force consisted of four troops of dragoons. The captain informed Carson that coming on behind him from the States was a caravan belonging to a very wealthy Mexican. It was a richly loaded train, and in order to insure its better protection while passing through that portion of the country infested by the blood-thirsty Comanches and Apaches, the majordomo in charge had hired one hundred Mexicans as a guard. The teamsters and others belonging to the caravan had heard that a large body of Texans were lying in wait for them, and intended to murder and plunder them in retaliation for the way Armijo had treated some Texan prisoners he had got in his power at Santa Fe some time before. Of course, it was the duty of the United States troops to escort this caravan to the New Mexico line, but there their duty would end, as they had no authority to cross the border. The Mexicans belonging to the caravan were afraid they would be at the mercy of the Texans after they had parted company with the soldiers, and when Kit Carson met them, they, knowing the famous trapper and mountaineer well, asked him to take a letter to Armijo, who was then governor of New Mexico, and resided in Santa Fe, for which service they would give him three hundred dollars in advance. The letter contained a statement of the fears they entertained, and requested the general to send Mexican troops at once to meet them.