Pedro was in for moving their headquarters to a great hollow Big Tree, the cavity in which was as large as a good sized room, with a Gothic sort of opening they could have made a door for. But the very next morning the old prospector arrived with the train of pack-burros, and they were off.
“How do you explain the Sequoias, Mr. Norris? Will we find more of them?” asked Pedro, with a last wistful backward glance.
“The Big Trees are by no means confined to Sequoia National Park and other well known groves,” said the Survey man. “The Sequoia gigantea is to be found in scattered groves for a distance of 250 miles or more, up and down the West slope of the Sierras, at altitudes just lower than that of the belt of silver firs,—that is, anywhere from 5,000 to 8,000 feet above sea level. And in fact, south of Kings’ River, the Sequoias stretch in an almost unbroken forest for seventy miles. Nor are they all of the proportions so often cited, where a man standing at their base looks like a fly on the wall by comparison with these prehistoric giants. Nor did they all get their start in life 4,000 years ago. There are young trees in plenty, saplings and seedlings, who will doubtless reach the patriarchal stage some 4,000 years hence. On what kind of earth will they look then? On what stage in the evolution of civilization? Will another ice age have re-carved these mountains? And how will man have learned to protect himself from the added severity of those winters?”
“It certainly gives one something to think about,” mused Pedro. “It is only in these younger specimens that you can see what a graceful tree it is!” He glanced from a feathery Big Tree youngster of perhaps 500 summers, with its slender branches drooping in blue-green plumes toward the base, with purple-barked limbs out-thrust on the horizontal half way up, and at the top reaching ardently heavenward. Near it stood a parent tree of perhaps middle age, born around the time of Christ, whose crown was still firmly rounded with the densely massed foliage, now yellow-brown, and the bark red-brown.
The millions of two inch cones, surprisingly tiny for such a tree, hang heavy with seeds,—they counted 300 in a single green cone.
“With such millions of seeds,” puzzled Pedro, “I should think the trees would grow so thick that there would be no walking between them.”
“No,” said Norris. “In the first place, remember that not one seed in a million escapes these busy Douglas squirrels and the big woodcocks that you hear drumming everywhere. Then even the millionth seed has to risk forest fires and snow-slides, lumbermen and lightning. But I’ll tell you something funny about them. You’d naturally think, from the number of streams in these forests, that they required a lot of moisture. Well, they don’t. Further South they grow and flourish on perfectly dry ground. But their roots retain so much rain and snow water that their tendency is to make streams. The dense crown helps too, by preventing evaporation. You’ll find Sequoias flourishing in a mere rift in a granite precipice. But wherever you find a dense growth, as you do here, there you will find their roots giving out the seepage that feeds a million streamlets, and these in turn feed the great rivers.
“You see these trees must be able to survive drouth or they could not have survived the changes of so many thousand years. Why, these Sequoias might have formed one continuous forest from the American River on South, if it had not been for the glaciers that swept down the great basins of the San Joaquin and Kings’ River, the Tuolumne and the Stanislaus.”
“But why didn’t the glaciers clean them off the basins of the Kaweah and the Tule Rivers, too?”
“Ah! There the giant rock spurs of the canyons of the King and the Kern protected the Tule and the Kaweah, by shunting the ice off to right and left.”