THE GREAT SLOTH You have heard of Indians shooting rapids in their birch-bark canoes?
And perhaps you have yourself sailed a toy boat on a stream, and made a dam of clay, and waited with more or less patience till the water rose nearly to the top, and then broken a bit of your dam out and made a waterfall and let your boat drift over the edge of it.

You know how it goes slowly at first, then hesitates and sweeps on more and more quickly.

Sometimes it upsets; and sometimes it shudders and strains and trembles and sways to one side and to the other, and at last rights itself and makes up its mind, and rushes on down the stream, usually to be entangled in the clump of rushes at the stream's next turn.

This is what happened to that good yacht, the _Lightning Loose_.

She shot over the edge of that dark smooth subterranean waterfall, hung a long breathless moment between still air and falling water, slid down like a flash, dashed into the stream below, shuddered, reeled, righted herself and sped on.