He had only a vague idea what otters were like, but he knew a good deal
about sliding down hill. He pictured to himself a high, rough bank
leading down to the water; but as not even Bill's daring imagination
would have represented the gamesome beasts as employing toboggans or
hand-sleds, he thought it must be rather bumpy and uncomfortable work
coasting over the roots and rocks on one's own unprotected anatomy.

The sounds continued, growing louder and louder, till the two
adventurers must have been within thirty or forty feet of the stream;
and they were creeping as noiselessly as a shadow slips over the grass,
in the hope of catching the merrymakers at their game. But suddenly
there came one great splash, heavy and prolonged, as if all the sliders
had come down close together. And then silence. Uncle Andy crouched
motionless for several minutes, as if he had been turned into a stump.
Then he straightened himself up with a disappointed air.

"Gone!" he muttered. "Cleared out! They've heard us or smelt us!"

"Oh!" exclaimed the Babe in a voice of deep concern; though, as a
matter of fact, he was immensely relieved, the strain of the prolonged
tension and preternatural stillness having begun to make him feel that
he must make a noise or burst.

Two minutes later they came out on the banks of the stream.

The stream at this point was perhaps twenty-five feet in width, deep,
dark, and almost without current. Only by noting the bend of the long
watergrasses could one tell which way it ran. The hither bank was low
and grassy, with a fallen trunk slanting out into the water. But the
shore opposite was some twelve or fifteen feet high, very steep, and