“No. I am perfectly sane.”
“Don’t ye know thar’s dozens of dead men out on that plain.”
“I do know it!” replied Frank, “but I’ll venture not one of them attempted to cross in the night.”
“Eh, what diffrunce mought it make whether day or night?”
“All the difference in the world. You will see that only certain localities in the valley throw up those balls of fire.”
The trapper was interested.
“Yas!”
“You will see that there are other spaces wholly free from the display.”
“I reckon so!”
“Well, where you see none of the lights, that space is free from the gas. It is only where you see the balls of fire that any of the deadly gas is to be found.”