It is so long since I first took opium that if it had been a trifling incident in my life I might have forgotten its date; but cardinal events are not to be forgotten, and from circumstances connected with it I remember that it must be referred to the autumn of 1804. During that season I was in London, having come thither for the first time since my entrance at college. And my introduction to opium arose in the following way. From an early age I had been accustomed to wash my head in cold water at least once a day: being suddenly seized with toothache, I attributed it to some relaxation caused by an accidental intermission of that practice, jumped out of bed, plunged my head into a basin of cold water, and with hair thus wetted went to sleep. The next morning, as I need hardly say, I awoke with excruciating rheumatic pains of the head and face, from which I had hardly any respite for about twenty days. On the twenty-first day I think it was, and on a Sunday, that I went out into the streets, rather to run away, if possible, from my torments, than with any distinct purpose. By accident I met a college acquaintance, who recommended opium. Opium! dread agent of unimaginable pleasure and pain! I had heard of it as I had of manna or of ambrosia, but no further. How unmeaning a sound was it at that time: what solemn chords does it now strike upon my heart! what heart-quaking vibrations of sad and happy remembrances! Reverting for a moment to these, I feel a mystic importance attached to the minutest circumstances connected with the place and the time and the man (if man he was) that first laid open to me the Paradise of Opium-eaters. It was a Sunday afternoon, wet and cheerless: and a duller spectacle this earth of ours has not to show than a rainy Sunday in London. My road homewards lay through Oxford Street; and near "the stately Pantheon" (as Mr. Wordsworth has obligingly called it) I saw a druggist's shop. The druggist - unconscious minister of celestial pleasures! -...