"That's all right," said Bert, "we forgive you. I'm glad to see that you realize what a crime it was."

After this they fell to discussing the events of the day before, and became so interested that they could hardly believe it was lunch time, when the whistles blew and the men threw down their tools and prepared to take a well earned rest for a brief hour. "Well," said Bert, glancing at his watch, "I guess it's about time we hit the trail toward the nearest eats emporium. Now that its called to my attention, I begin to realize that I'm hungry."

The others also discovered symptoms of a healthy appetite, so without further loss of time they hurried back to their 'base of supplies' as Tom put it.

"If we're as hungry as this without having done much all the morning, what would we be if we had been working since eight o'clock?" queried Dick, and the others were unable to give him a satisfactory answer.

"I guess they'd have to stop work, owing to a shortage in the food supply," said Bert, and his companions laughingly agreed with him.

They made a hearty lunch, and then returned to the scene of the excavations. There were a thousand interesting things to watch, and the afternoon passed very quickly. Their attention was specially attracted by one giant steam shovel that rattled and puffed like some untiring monster. The engineer guiding it directed its every motion with a touch of one of the levers close to his hand, and it seemed as though the machine were a living creature and he its brain. The great scoop would drop with a roar of chains passing through pulleys, and then, as the main engine began to puff, would rise slowly but with irresistible force.. Then a pair of auxiliary cylinders mounted on the beam of the shovel would begin to work, and the big scoop with its load of dirt and rocks would swing around and stop over one of the dirt cars. The engineer's assistant would pull a rope attached to the scoop, a catch would be released, and the bottom of the scoop would swing open, letting the load fall into the waiting car. This process would be repeated again and again, and then, when the shovel had scooped up all the dirt around it, it would be moved forward a few feet, under its own power, to a new base of operations.

It seemed that its power was almost limitless, but at last there came a time when the boys thought it would meet an insurmountable obstacle. Close to where they sat, a big stump projected from the ground. Part of its gnarled and twisted roots was exposed, but a good deal of it was firmly imbedded in the earth. The steam shovel had worked its way along, until now it had reached a spot directly in front of this stump. The boys thought that some laborers would be sent to uproot it, so that the shovel could proceed, but there was no sign of this being done.

"Say!" exclaimed Dick. "I'll bet any money they mean to uproot that stump with the shovel, but I don't believe it can be done. Why, it would take a charge of dynamite to get that up."

"It certainly looks pretty solid," said Bert, "but they must know what they're doing. We won't have to wait long, though, to find out. Look! they're bringing the scoop up under it now!"

The three comrades watched intently as the big scoop dug in under the stump. As it came fairly up against the obstacle it slowed and almost stopped, and the boys caught their breaths. But the engineer opened the throttle a trifle more, and the stump moved! Slowly it gave way, one root after another snapping off with a loud report, and at last was lifted clear of the ground.