All respectable chemists, Montgomery assures me, keep the cio-root. That is the name of the drug, and Montgomery is the man who ought to write its testimonials. This is a testimonial to the efficacy of the cio-root, and I write it the more willingly, because, until the case of Montgomery cropped up, I had no faith in patent medicines. Seeing, however, is, they say, believing; and I have seen what the cio-root did for Montgomery. I can well believe now that it can do anything, from removing grease-spots to making your child cry out in the night. Montgomery, who was married years ago, is subject to headaches, and formerly his only way of treating them was to lie in bed and read a light novel. By the time the novel was finished, so, as a rule, was the headache. This treatment rather interfered with his work, however, and he tried various medicines which were guaranteed to cure rapidly. None of them had the least result, until one day, some two months ago, good fortune made him run against an old friend in Chambers street. Montgomery having a headache, mentioned it, and his friend asked him if he had tried the cio-root. The name even was unfamiliar to Montgomery, but his friend spoke so enthusiastically of it that the headachy man took a note of it. He was told that it had never been known to fail, and the particular merit of it was that it drove the headache away in five minutes. The proper dose to take was half an inch of the root, which was to be sucked and eventually swallowed. Montgomery tried several chemists in vain, for they had not heard of it, but at last he got it on George IV. Bridge. He had so often carried home in triumph a "certain cure," which was subsequently flung out at the window in disgust, that his wife shook her head at the cio-root, and advised him not to be too hopeful. However, the cio-root surpassed the fondest expectations. It completely cured Montgomery in less than the five minutes. Several times he tried it, and always with the same triumphant result. Having at last got a drug to make an idol of, it is not perhaps to be wondered at that Montgomery was full of gratitude. He kept a three pound tin of the cio-root on his library-table, and the moment he felt a headache coming on he said, "Excuse me for one moment," and bit off half an inch of cio-root.