"I agree with you there," said Glenarvan; "but now tell us, Paganel, how it is that the leaves grow in this fashion?"

"From a purely physical cause, friends," said Paganel, "and one that you will easily understand. In this country where the air is dry and rain seldom falls, and the ground is parched, the trees have no need of wind or sun. Moisture lacking, sap is lacking also. Hence these narrow leaves, which seek to defend themselves against the light, and prevent too great evaporation. This is why they present the profile and not the face to the sun's rays. There is nothing more intelligent than a leaf."

"And nothing more selfish," added the Major. "These only thought of themselves, and not at all of travelers."

Everyone inclined to the opinion of McNabbs except Paganel, who congratulated himself on walking under shadeless trees, though all the time he was wiping the perspiration from his forehead. However, this disposition of foliage was certainly to be regretted, for the journey through the forest was often long and painful, as the traveler had no protection whatever against the sun's fierce rays.