"Guess we can't get at that," said Herb after they had stood for some time silent on the bank of this cataract. "Let's go back—unless Fred wants to take a picture."
"It's gettin' kind of dark for that," said Fred. At this remark the others suddenly noticed that the sun had disappeared behind a cloud and the sky looked black.
"Say," exclaimed Fly, "that looks like a pretty ugly cloud over there."
"What if there should be a bully storm?" exclaimed Jerry, eager for the excitement.
"Gee, I was in a mountain storm once," recounted Herb, "and it was great. There was a couple of tenderfeet with us, and they was scared to death. Yuh scared, Windy?"
"Naw," replied Fred scornfully. "Anyhow, looks as though the sun has just gone behind a cloud and will soon be out again."
"Kind o' cold," complained Fly, buttoning his coat. "Say, I wonder—" he stopped, for there was an ominous rumble among the darkening clouds which were hurriedly crowding together like a dark-clad army maneuvering for a sudden attack.
"That's old man Thor," said Dunk, who was something of a poet at times, and had read more extensively than the average boy of his age. "He's gettin' ready to hit us between the eyes. Ain't you awful afraid, Tender?"
Just then a blinding streak of fire cut its zigzag way through the black sky, lighting up every peak and crevice, followed by a sharp crack that broadened into a deafening roar and made the boys jump with surprise.
"We're in for it, all right," said Herb laughing. "My, this is going to be terrible, Windy," he added with mock solemnity.