128 THE GIANT'S HEART.
now the passage was wide. Nearly worn out, they saw light overhead at last, and creeping through a crack into the open air, found themselves on the fork of a huge tree. A great, broad, uneven space lay around them, out of which spread boughs in every direction, the smallest of them as big as the biggest tree in the country of common people. Overhead were leaves enough to supply all the trees they had ever seen. Not much moonlight could come through, but the leaves would glimmer white in the wind at times. The tree was full of giant birds. Every now and then, one would sweep through, with a great noise. But, except an occasional chirp, sounding like a shrill pipe in a great organ, they made no noise. All at once an owl began to hoot. He thought he was singing. As soon as he began, other birds replied, making rare game of him. To their astonishment, the children found thev could