Captain Marsh stood easily staring directly ahead of him, and paying no more attention to the child. Bobby sat very straight in his absorption. New impressions were coming to him so fast that he had no desire to move. The slow turn of the great wheel; the throb of the engine; the swift passing of water; the orderly procession of the river banks; the feeling of smooth, resistless motion--these sufficed. How long he might have sat there if undisturbed, it would be hard to say; but at the end of a few moments Angus McMullen looked in at the door. "What you stayin' here for, Bobby?" he inquired with contemptuous wonder. "Come on out and see the big waves we're making." Outside Bobby found all the grown-ups gathered forward of the pilot house. The older people were seated on folding camp chairs, the equilibrium of which they found some difficulty in maintaining on the sloping deck. Bradford, Carlin, Welton and Miss Proctor, however, had established themselves in the extreme bow. Miss Proctor perched on the bitts, while the men stood or leaned near at hand. Occasionally, as the tug changed course, Miss Proctor would utter a little exclamation and thrust her arms out aimlessly, as though uncertain. All three of the men thereupon assured her balance for her. With the group Bobby saw the little girl with light hair. "Not up there," advised Angus. "This way." A very narrow passage ran between the thick gunwale and the deck-house. It sloped down and then gradually up toward the stern. At its lowest point it seemed to Bobby fearfully near the river; and as he descended to that point he discovered that indeed the displacement of rapid running appeared to force the water even above the level of the deck. Bits of chip, sawdust and the like shot swiftly by in the smooth, oily curve of the liquid. The wet smell of it came to Bobby's eager nostrils, the subtle cool aroma of the river. But, from a little door level with the deck, smoking a pipe, leaned a negro who greeted them jovially. He dwelt in a narrow place down in the hull, filled with machinery and the glow of a furnace. The boys hung in the opening fascinated by the regular rise and fall of the polished rods; savouring the feel of heavy heated air and the clean smell of oil. In a moment the negro flung open an iron door whence immediately sprang glowing light and a blast of heat. Into this door he thrust two or three long slabs which he took from the deck on the other side of the tug; and shut it to with a clang. After gazing their fill, the boys continued their way back. The deck-house ended. They found themselves on the broad, flat, spoon-shaped after-deck occupied by the strong towing-bitts and coils of cable. "Isn't this great?" asked Angus.