Not aiming to be technical, but desiring to give the reader the benefit of such scraps of learning as I pick up in my travels, modern science has discovered that the eye is retained in its orbit by six muscles, which pull it up and down, inward and outward, and that the undue contraction of either of these muscles produces that obliquity called squinting, which was once supposed to proceed from convulsions in childhood, or other unknown causes. The cure discovered is the cutting of the contracted muscle, by means of which the eye falls immediately into its proper place. This muscle lies under the surface; and, as it is necessary to pass through a membrane of the eye, the cutting cannot be done with a broadaxe or a handsaw. In fact, it requires a knowledge of the anatomy of the eye, manual dexterity, fine instruments, and Mr. Catherwood and myself for assistants.

Our patient remained perfectly quiet, with his little hands folded across his breast; but while the knife was cutting through the muscle he gave one groan, so piteous and heart-rending, that it sent into the next room all who were not immediately engaged. But before the sound of the groan had died away the operation was over, and the boy rose with his eye bleeding, but perfectly straight. A bandage was tied over it, and, with a few directions for its treatment, amid the congratulations and praises of all present, and wearing the same smile with which he had entered, the little fellow walked off to his mother.

The news of this wonder spread rapidly, and before night Dr. Cabot had numerous and pressing applications, among which was one from a gentleman whom we were all desirous to oblige, and who had this defect in both eyes.

On his account we determined to postpone our departure another day; and, in furtherance of his original purpose, Dr. Cabot mentioned that he would perform the operation upon all who chose to offer. We certainly took no trouble to spread this notice, but the next morning, when we returned from breakfast, there was a gathering of squint-eyed boys around the door, who, with their friends and backers, made a formidable appearance, and almost obstructed our entrance. As soon as the door opened there was a rush inside; and as some of these slanting eyes might not be able to distinguish between meum and tuum, we were obliged to help their proprietors out into the street again.

At ten o'clock the big table was drawn up to the window, and the mattress and pillow were spread upon it, but there was such a gathering around the window that we had to hang up a sheet before it. Invitations had been given to Dr. Bado and Dr. Munoz, and all physicians who chose to come, and having met the governor in the evening, I had asked him to be present. These all honoured us with their company, together with a number of self-invited persons, who had introduced themselves, and could not well be turned out, making quite a crowded room.

The first who presented himself was a stout lad about nineteen or twenty, whom we had never seen or heard of before. Who he was or where he came from we did not know, but he was a bisco of the worst kind, and seemed able-bodied enough to undergo anything in the way of surgery. As soon as the doctor began to cut the muscle, however, our strapping patient gave signs of restlessness; and all at once, with an actual bellow, he jerked his head on one side, carried away the doctor's hook, and shut his eye upon it with a sort of lockjaw grip, as if determined it should never be drawn out. How my hook got out I have no idea; fortunately, the doctor let his go, or the lad's eye would have been scratched out. As it was, there he sat with the bandage slipped above one eye, and the other closed upon the hook, the handle of which stood out straight. Probably at that moment he would have been willing to sacrifice pride of personal appearance, keep his squint, and go through life with his eye shut, the hook in it, and the handle sticking out; but the instrument was too valuable to be lost. And it was interesting and instructive to notice the difference between the equanimity of one who had a hook in his eye, and that of lookers-on who had not. All the spectators upbraided him with his cowardice and want of heart, and after a round of reproof to which he could make no answer, he opened his eye and let out the hook. But he had made a bad business of it. A few seconds longer, and the operation would have been completed. As it was, the whole work had to be repeated. As the muscle was again lifted under the knife, I thought I saw a glare in the eyeball that gave token of another fling of the head, but the lad was fairly browbeaten into quiet; and, to the great satisfaction of all, with a double share of blackness and blood, and with very little sympathy from any one, but with his eye straight, he descended from the table. Outside he was received with a loud shout by the boys, and we never heard of him again.

The room was now full of people, and, being already disgusted with the practice of surgery, I sincerely hoped that this exhibition would cure all others of a wish to undergo the operation, but a little Mestizo boy, about ten years old, who had been present all the time, crept through the crowd, and, reaching the table, squinted up at us without speaking, his crisscross expression telling us very plainly what he wanted. He had on the usual Mestizo dress of cotton shirt and drawers and straw hat, and seemed so young, simple, and innocent, that we did not consider him capable of judging for himself. We told him he must not be operated on, but he answered, in a decided though modest tone, "Yo quiero, yo quiero," "I wish it, I wish it." We inquired if there was any one present who had any authority over him, and a man whom we had not noticed before, dressed, like him, in shirt and drawers, stepped forward and said he was the boy's father; he had brought him there himself on purpose, and begged Doctor Cabot to proceed. By his father's directions, the little fellow attempted to climb up on the table, but his legs were too short, and he had to be lifted up. His eye was bandaged, and his head placed upon the pillow. He folded his hands across his breast, turned his eye, did in all things exactly as he was directed, and in half a minute the operation was finished. I do not believe that he changed his position a hair's breadth or moved a muscle. It was an extraordinary instance of fortitude. The spectators were all admiration, and, amid universal congratulation, he was lifted from the table, his eye bound up, and, without a word, but with the spirit of a little hero, he took his father's hand and went away.

At this time, amid a press of applicants, a gentleman came to inform us that a young lady was waiting her turn. This gave us an excuse for clearing the room, and we requested all except the medical gentlemen and the immediate friends to favour us with their absence. Such was the strange curiosity these people had for seeing a most disagreeable spectacle, that they were very slow in going away, and some slipped into the other rooms and the yard, but we ferreted them out, and got the room somewhat to ourselves.

The young lady was accompanied by her mother. She was full of hesitation and fears, anxious to be relieved, but doubting her ability to endure the pain, and the moment she saw the instruments, her courage entirely forsook her. Doctor Cabot discouraged all who had any distrust of their own fortitude, and, to my mingled joy and regret, she went away.

The next in order was the gentleman on whose account we had postponed our departure. He was the oldest general in the Mexican service, but for two years an exile in Merida. By the late revolution, which placed Santa Ana in power, his party was uppermost; and he had strong claims upon our good feelings, for, in a form expatriation from Mexico, he had served as volunteer aid to General Jackson at the battle of New-Orleans. This gentleman had an inward squint in both eyes, which, however, instead of being a defect, gave character to his face; but his sight was injured by it, and this Doctor Cabot thought might be improved. The first eye was cut quickly and successfully, and while the bloody orb was rolling in its socket, the same operation was performed upon the other. In this, however, fearing that the eye might be drawn too far in the opposite direction, the doctor had not thought it advisable to cut the muscle entirely through, and, on examining it, he was not satisfied with the appearance. The general again laid his head upon the pillow, and the operation was repeated, making three times in rapid succession. Altogether, it was a trying thing, and I felt immensely happy when it was over. With his eyes all right and both bandaged, we carried him to a caleza in waiting, where, to the great amusement of the vagabond boys, he took his seat on the footboard, with his back to the horse, and it was some time before we could get him right.