Evidently they were celebrating the shipment of the mine's first output, or waiting to see it put safely aboard the train at the Junction.

So Whitey invited Injun to spend the night, and he accepted willingly, as it gave him a chance to wear the pink pajamas that he loved.
Yawning time had come and passed.

Whitey was sleeping soundly and dreamlessly, when he was aroused by a grip on his arm.

It was Injun in his pink pajamas.
"Some one come," he said.
"Mebbe it's Bill and the others," Whitey ventured.
"Not Bill--only one man," Injun replied.
The coming of a man didn't seem important to Whitey, but he knew Injun must have had something on his mind, or he wouldn't have waked him, and he waited for his friend to speak more of the words of which he was so sparing.

The next speech was not long.
"Look," said Injun, and he went to the window.
Whitey went and looked.