At length we turned off towards the north, and by-and-by were entering a huge building of gray stone, with tall pillars in front of it, which my father told me was the British Museum. What a place for a boy! Endless halls of statues; enormous saloons filled with glass-cases of shells; cases of innumerable birds; acres of butterflies and other insects; strange objects which I did not understand--magic globes of shining crystal, enormous masses of iron which were said to have fallen from the sky; vases and jewels; and finally, at the farther end of a corridor, a small door, softly opening, disclosed a circular room of stupendous proportions, domed above, the curving walls filled with myriads of books. In the centre was a circular arrangement of desks, and in the midst of these an elderly man, like a garden-spider in his web; but it was his duty to feed, not devour, the human flies who sat or walked to and fro with literary meat gathered from all over the world. It was my first vision of a great library. Another time we went--all of us, I think--to the Tower of London. I vibrated with joy at the spectacle of the array of figures in armor, and picked out, a score of times, the suit I would most gladly choose to put on. Here were St. George, King Arthur, Sir Scudamour, Sir Lancelot--all but their living faces and their knightly deeds! Then I found myself immured in dungeons with walls twenty feet thick, darksome and low-browed, with tiny windows, and some of them bearing on their stones strange inscriptions, cut there by captives who were nevermore to issue thence, save to the block. Here the great Raleigh had been confined; here, the lovable, rash-tempered Essex; here, the noble Sir Henry Vane, who had once trod the rocky coast of my own New England. Everywhere stood on the watch or paced about the Beef-eaters in their brilliant fifteenth-century motley. I have never since then passed the portals of the Tower, nor seen again the incomparable gleam of the Koh-i-noor--if it were, indeed, the Koh-i-noor that I saw, and not a glass model foisted on my innocence.