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 journey in view and intent only upon overtaking the big bird ahead of him, was exerting his powers to the utmost. In less than half an hour he had drawn up to within a hundred yards of the other and at the same time had mounted to approximately the same level. Not until then did the bald eagle betray knowledge of his pursuer's approach; possibly not until then was he aware that he was being pursued. Suddenly he swerved from his straight course, swinging to the right in a wide circle and spiraling upward, at the same moment uttering a fierce, cackling scream.

For several seconds the golden eagle held his onward way. Then he, too, swung to the right and circled upward. But he did not answer the other's challenge, and he did not, as a human onlooker might have expected, hurl himself at once upon the stalwart stranger whose piercing eyes, no less arrogant than his own, denoted a spirit by no means averse to a battle in the air. For a few minutes the two regal birds, equals in size and martial bearing, circled and sailed in close proximity, each watching the other narrowly and each evidently prepared for any hostile move that the other might make. Then the bald eagle swung sharply to the left and, passing within ten feet of the golden eagle, resumed his journey.

Yet as though not quite sure that he would not