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In the end he poked his head above the roof of leaves, and then he found spiders all right. But they were only small ones of ordinary size, and they were after the butterflies. Bilbo's eyes were nearly blinded by the light. He could hear the dwarves shouting up at him from far below, but he could not answer, only hold on and blink. The sun was shining brilliantly, and it was a long while before he could bear it. When he could, he saw all round him a sea of dark green, ruffled here and there by the breeze; and there were everywhere hundreds of butterflies. I expect they were a kind of 'purple emperor,' a butterfly that loves the tops of oak-woods, but these were not purple at all, they were a dark dark velvety black without any markings to be seen.
He looked at the 'black emperors' for a long time, and enjoyed the feel of the breeze in his hair and on his face; but at length the cries of the dwarves, who were now simply stamping with impatience down below, reminded him of his real business. It was no good. Gaze as much as he might, he could see no end to the trees and the leaves in any direction. His heart, that had been lightened by the sight of the sun and the feel of the wind, sank back into his toes: there was no food to go back to down below.
Actually, as I have told you, they were not far off the edge of the forest; and if Bilbo had had the sense to see it, the tree that he had climbed, though it was tall in itself, was standing near the bottom of a wide valley, so that from its top the trees seemed to swell up all round like the edges of a great bowl, and he could not expect to see how far the forest lasted. Still he did not see this, and he climbed down full of despair. He got to the bottom again at last scratched, hot, and miserable, and he could not see anything in the gloom below when he got there. His report soon made the others as miserable as he was.
"The forest goes on for ever and ever and ever in all directions! Whatever shall we do? And what is the use of sending a hobbit!" they cried, as if it was his fault. They did not care tuppence about the butterflies, and were only made more angry when he told them of the beautiful breeze, which they were too heavy to climb up and feel.
That night they ate their very last scraps and crumbs of food; and next morning when they woke the first thing they noticed was that they were still gnawingly hungry, and the next thing was that it was raining and that here and there the drip of it was dropping heavily on the forest floor. That only reminded them that they were also parchingly thirsty, without doing anything to relieve them: you cannot quench a terrible thirst by standing under giant oaks and waiting for a chance drip to fall on your tongue. The only scrap of comfort there was, came unexpectedly from Bombur.
He woke up suddenly and sat up scratching his head. He could not make out where he was at all, nor why he felt so hungry; for he had forgotten everything that had happened since they started their journey that May morning long ago. The last thing that he remembered was the party at the hobbit's house, and they had great difficulty in making him believe their tale of all the many adventures they had had since.