It was during my convalescence that the fate of the Texan expedition to Santa Fé was decided; and as the real facts have been studiously concealed, and my intelligence, gained from the Indians, who were disinterested parties, was afterwards fully corroborated by an Irish gentleman who had been persuaded to join it, I may as well relate them here. Assuming the character of friendly traders, with some hundred dollars' worth of goods, as a blind to their real intentions, which were to surprise the Mexicans during the neutrality which had been agreed upon, about five hundred men were collected at Austin, for the expedition.

Although the report was everywhere circulated that this was to be a trading experiment, the expedition, when it quitted Austin, certainly wore a very different appearance. The men had been supplied with uniforms; generals, and colonels, and majors were dashing about in every direction, and they quitted the capital of Texas with drums beating and colours flying. Deceived by the Texans, a few respectable Europeans were induced to join this expedition, either for scientific research or the desire to visit a new and unexplored country, under such protection, little imagining that they had associated themselves with a large band of robbers, for no other name can be given to these lawless plunderers. But if the force made a tolerable appearance on its quitting the capital, a few hours' march put an end to all discipline and restraint.

Although the country abounded with game, and it was killed from mere wantonness, such was their improvidence, that they were obliged to resort to their salt pork and other provisions; and as, in thirty days, forty large casks of whisky were consumed, it is easy to suppose, which was indeed the fact, that every night that they halted, the camp was a scene of drunkenness and riot.

During the last few days of the march through the game country they killed more than a hundred buffaloes, yet, three days after they had quitted the prairies, and had entered the dreary northern deserts, they had no provisions left, and were compelled to eat their worn-out and miserable horses.

A true account of their horrible sufferings would beggar all description; they became so weak and utterly helpless that half a dozen Mexicans, well mounted, could have destroyed them all. Yet, miserable as they were, and under the necessity of conciliating the Indians, they could not forego their piratical and thieving propensities. They fell upon a small village of the Wakoes, whose warriors and hunters were absent, and, not satisfied with taking away all the eatables they could carry, they amused themselves with firing the Indian stores and shooting the children, and did not leave until the village was reduced to a heap of burning ashes. This act of cowardice sealed the fate of the expedition, which was so constantly harassed by the Wakoe warriors, and had lost already so many scalps, that afterwards meeting with a small party of Mexicans, they surrendered to them, that they might escape the well deserved and unrelenting vengeance of the warlike Wakoes.

Such was the fate of the Texan expedition; but there is another portion of the history which has been much talked of in the United States; I mean the history of their captivity and sufferings, while on their road from Santa Fé to Mexico. Mr. Daniel Webster hath made it a government question, and Mr. Pakenham, the British Ambassador in Mexico, has employed all the influence of his own position to restore to freedom the half-dozen of Englishmen who had joined the expedition. Of course, they knew nothing of the circumstances, except from the report of the Texans themselves. Now, it is but just that the Mexicans' version should be heard also. The latter is the true one--at least, so far as I can judge by what I saw, what I heard upon the spot, and from some Mexican documents yet In my possession.

The day before their capture the Texans, who for the last thirteen days had suffered all the pangs of hunger, came suddenly upon a flock of several thousand sheep, belonging to the Mexican government. As usual, the flock was under the charge of a Mexican family, living in a small covered waggon, in which they could remove from spot to spot, shifting the pasture-ground as required. In that country but very few individuals are employed to keep the largest herds of animals; but they are always accompanied by a number of noble dogs, which appear to be particularly adapted to protect and guide the animals. These dogs do not run about, they never bark or bite, but, on the contrary, they will walk gently up to any one of the flock that happens to stray, take it carefully by the ear, and lead it back to its companions. The sheep do not show the least fear of these dogs, nor is there any occasion for it. These useful guardians are a cross of the Newfoundland and St. Bernard breed, of a very large size, and very sagacious.

Now, if the Texans had asked for a hundred sheep, either for money or in barter (a sheep is worth about sixpence), they would have been supplied directly; but as soon as the flock was perceived one of the Texan leaders exclaimed, with an oath, "Mexicans' property, and a welcome booty; upon it, my boys, upon it, and no mercy," One of the poor Mexicans who had charge was shot through the head; the others succeeded In escaping by throwing themselves down among the thick ranks of the affrighted animals, till out of rifle-distance; then began a carnage without discrimination, and the Texans never ceased firing until the prairie was for miles covered with the bodies of their victims. Yet this grand victory was not purchased without a severe loss, for the dogs defended the property intrusted to their care; they scorned to run away, and before they could all be killed they had torn to pieces half a dozen of the Texans, and dreadfully lacerated as many more. The evening was, of course, spent in revelry; the dangers and fatigues, the delays and vexations of the march were now considered over, and high were their anticipations of the rich plunder in perspective. But this was the only feat accomplished by this Texan expedition: the Mexicans had not been deceived; they had had intelligence of the real nature of the expedition, and advanced parties had been sent out to announce its approach. Twenty-four hours after they had regaled themselves with mutton, one of these parties, amounting to about one hundred men, made its appearance. All the excitement of the previous evening had evaporated, the Texans sent out a flag of truce, and three hundred of them surrendered themselves unconditionally to this small Mexican force.

On one point the European nations had been much deceived, which is as to the character of the Mexican soldier, who appears to be looked upon with a degree of contempt. This is a great mistake, but it has arisen from the false reports and unfounded aspersions of the Texans, as to the result of many of their engagements. I can boldly assert (although opposed to them) that there is not a braver individual in the world than the Mexican; in my opinion, far superior to the Texan, although probably not equal to him in the knowledge and use of firearms.

One great cause of the Mexican army having occasionally met with defeat is that the Mexicans, who are of the oldest and best Castile blood, retain the pride of the Spanish race to an absurd degree. The sons of the old nobility are appointed as officers; they learn nothing, know nothing of military tactics--they know how to die bravely, and that is all.