They ate the lunch in quiet contentment, taking it easy on the soft grass. It seemed good to be out on the trail again, feasting on the wonders of nature. Bob and Joe were impressed by the stillness of the great forest. "This is about the only kind of a woods you can get through," remarked Bob, his eyes on the numerous cork-oak trees. "A tropical jungle has so much undergrowth and vines that it keeps you busy cutting them away with a machete." An hour or two after the repast was spent in resting their tired limbs and chatting merrily. Then Mr. Lewis suggested that they continue the hunt. "We won't have so very much time left," he said. "And we'd like to get several more specimens." A little later they came to a narrow valley between two high mountains. A tiny spring trickled from beside a large rock, and they welcomed the taste of the refreshing liquid. It was quite cold, showing that it probably came from an underground stream. "Drink all you want," said Mr. Lewis. "It's likely the last water we'll see till we get back to Arba." All the remainder of that afternoon the explorers trudged on, bringing down several small animals and birds. None of them happened to be dangerous, however. The hunters had described a wide circle that took them by sundown within a mile or two from Arba, and the accuracy of the naturalists' calculations was greatly appreciated, for they were very tired and did not feel that they would care to have to hike a great distance to get to the automobile. "Wonder if the old car's still there," mused Bob, as they came to the limits of Arba. "Don't know why it shouldn't be," returned his chum. "Nobody'd want it for anything." It required but a short time to reach the main part of the town. Then they turned off on the street where the car was parked. "It's there!" cried Joe, making out its ancient shape in the distance. The others shared in his enthusiasm. They had had an uneasy feeling about its safety all day, despite the fact that the ignition had been locked. In a short time the explorers were in the seats, and Joe, who had asked to drive, began the task of starting the engine. It finally responded to the sluggish self-starter. "Now let's hurry and get back to Algiers," urged Mr. Holton. "We don't want to be out after dark, for there's no telling how good these lights are." During the next half-hour Joe pulled the throttle as far down as possible, and then complained because he could only do forty-five. However, it was not long before they saw the lights of Algiers in the distance. "Now to get something to eat," said Mr. Holton, sitting up in the seat in anticipation. "It will be good to see the old hotel again, won't it?" "Sure will," replied Bob. "I'll bet Dr. Kirshner expected us long before this."