The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Astoria by Washington Irving:|
sunken trees, presenting a jagged or pointed end above the
surface of the water. As the channel of the river frequently
shifted from side to side according to the bends and sand-banks,
the boat had, in the same way, to advance in a zigzag course.
Often a part of the crew would have to leap into the water at the
shallows, and wade along with the towing line, while their
comrades on board toilfully assisted with oar and setting pole.
Sometimes the boat would seem to be retained motionless, as if
spell-bound, opposite some point round which the current set with
violence, and where the utmost labor scarce effected any visible