"The Bird of Fortune sported a curving bow and a high foredeck. On this was fastened the many-spoked steering wheel. Two helmsmen always attended it, two men wearing hexagonal goggles and close-fitting leather helmets with high crests of curled wire. Behind them stood the captain and first mate, giving their attention alternately to the helmsmen and to the sailors on deck and aloft. The middeck was sunken, and the poopdeck, though raised, was not as high as the foredeck.
The four masts were tall, but not as tall as those of a marine craft of similar size. High masts would have given the 'roller a tendency to capsize in a very strong wind, despite the weight of the axles and wheels. Therefore, the yardarms, reaching far out beyond the sides of the hull, were comparatively longer than a seaship's. When the Bird carried a full weight of canvas she looked, to a mariner's eyes, squat and ungainly. Moreover, yards had been fixed at right angles to the top of the hull and to the keel itself. Extra canvas was hung between these spars. The sight of all that sail sticking from between the wheels was enough to drive an old sailor to drink.
Three masts were square-rigged. The aft mast was fore-and-aft rigged and was used to help the steering. There was no bowsprit.
Altogether, it was a strange-looking craft. But once one was accustomed to it, one saw it was as beautiful as a ship of the sea.
It was as formidable, too, for the Bird carried five large cannon on the middeck, six cannon on the second deck, a lighter swivel cannon on the steering deck, and two swivels on the poopdeck.
Hung from davits were two long liferollers and a gig, all wheeled and with folding masts. If the Bird was wrecked it could be abandoned and all the crew could scoot off in the little rollers."
The Green Odyssey, Philip José Farmer