One evening, in summer, he went into his own room, and stood at the lattice-window, and gazed into the forest which fringed the outskirts of Fairyland. It came close up to his great-aunt's garden, and, indeed, sent some straggling trees into it. The forest lay to the east, and the sun, which was setting behind the cottage, looked straight into the dark wood with his level red eye. The trees were all old, and had few branches below, so that the sun could see a great way into the forest; and the boy, being keen-sighted, could see almost as far as the sun. The trunks stood like rows of red columns in the shine of the red sun, and he could see down aisle after aisle in the vanishing distance. And as he gazed into the forest he began to feel as if the trees were all waiting for him, and had something they could not go on with till he came to them. But he was hungry, and wanted his supper. So he lingered. Suddenly, far among the trees, as far as the sun could shine, he saw a glorious thing. It was the end of a rainbow, large and brilliant. He could count all the seven colours, and could see shade after shade beyond the violet; while before the red stood a colour more gorgeous and mysterious still. It was a colour he had never seen before. Only the spring of the rainbow-arch was visible. He could see nothing of it above the trees. "The golden key!" he said to himself, and darted out of the house, and into the wood. He had not gone far before the sun set. But the rainbow only glowed the brighter: for the rainbow of Fairyland is not dependent upon the sun as ours is. The trees welcomed him. The bushes made way for him. The rainbow grew larger and brighter; and at length he found himself within two trees of it. It was a grand sight, burning away there in silence, with its gorgeous, its lovely, its delicate colours, each distinct, all combining. He could now see a great deal more of it. It rose high into the blue heavens, but bent so little that he could not tell how high the crown of the arch must reach. It was still only a small portion of a huge bow. He stood gazing at it till he forgot himself with delight--even forgot the key which he had come to seek. And as he stood it grew more wonderful still. For in each of the colours, which was as large as the column of a church, he could faintly see beautiful forms slowly ascending as if by the steps of a winding stair. The forms appeared irregularly--now one, now many, now several, now none--men and women and children--all different, all beautiful. He drew nearer to the rainbow. It vanished. He started back a step in dismay. It was there again, as beautiful as ever. So he contented himself with standing as near it as he might, and watching the forms that ascended the glorious colours towards the unknown height of the arch, which did not end abruptly, but faded away in the blue air, so gradually that he could not say where it ceased.