Orphans Mark and Jack are fostered by Professor Henderson, with help from the professor's assistant Washington White and his friend Andy Sudds, the big game hunter. In their first adventures the Professor builds a unique boat/dirigible called the Monarch, which they use to visit the North Pole.
the box car to avoid being jolted off. The wind fairly whistled in their ears. Through the town they rushed, observing, as by a flash, the white, frightened face of the station agent as he watched them go past.
"Do you think there'll be a smash-up?" asked Mark.
"I don't see how it can be avoided," replied Jack. "This track has to come to an end somewhere. When it does, look out, that's all!"
On and on rushed the train! It's speed was now fearful, for the down grade had increased. It was of no avail to twist the brakes, for no strength would avail to slacken the awful speed. The boys, in common with the brakemen, could only cling and wait in terror for what was to come.
The cars swayed as they went around a curve. Jack lifted his head and peered forward.
"Hold fast!" he shouted. "We're going to strike something in a minute!"
He had looked up in time to see that the track siding came to an abrupt end about a quarter of a mile further on, the rails stopping in a sand ban