But with a paddle a man can worm a boat through anywhere." "That is, if it is only wide enough for the boat to go," said Marco.
"Of course," replied Forester.

"The paddle itself requires no additional space.

But oars extend so far laterally"-- "Laterally ?" asked Marco.
"Yes," rejoined Forester; "that is, on each side.

Oars extend so far on each side, that they require a great breadth of water.

If you attempt to go through a narrow place, the oars would strike." "Why, no," said Marco.