"The second alternative was to cut clear through the dividing ridge which runs up at Obispo some 300 feet above sea level. Following that route for 9 miles in the direction of Panama you come to the alluvial plain of the Rio Grande, and from thence to the sea in another 6 miles. Forty-one miles from shore to shore you can call it, and, with the dredging we have to do at either end, a grand total of 50 miles. But we'll leave this Culebra cutting till we reach it. Sonny, you can get right along with the car." Jim would have been a very extraordinary mortal if he had not been vastly interested in all that he saw from his seat in the rail motor car. To begin with, it was a delightfully bright day, with a clear sky overhead and a warm sun suspended in it. Hills lay on either hand, their steep sides clothed with luxuriant verdure, while farther away was a dark background of jungle, that forbidding tropical growth with which he had now become familiar. On his right flowed the Chagres River, winding hither and thither, and receiving presently a tributary, the Rio Trinidad. Along the line there were gangs of men at work here and there laying the new tracks for the railway, while, when they had progressed on their journey, and were nearer Obispo, his keen eyes discovered other subjects for observation. There were a number of broken-down trucks beside the railway, which were almost covered by vegetation, while near at hand on the banks of the river a huge, unwieldy boat seemed to have taken root, and, like the trucks, was surrounded by tropical growth. "Queer, ain't they?" remarked Phineas. "Guess you're wondering what they are." "Reckon it's plant brought out here at the very beginning of this work, and scrapped because it was found to be unsatisfactory." "Wrong," declared Phineas promptly. "Young man, those trucks were made by the Frenchmen. That boat is a dredger which was laid up before you were born, and was built by the same people." The information caused our hero to open his eyes very wide, for he, like many another individual, had never heard of the French nation in connection with the isthmus of Panama; or if he had, had entirely forgotten the matter. But to a man like Phineas, with all his keenness in the work in which he was taking no unimportant part, it was not remarkable that French efforts on the isthmus were a matter of historical interest to him.