Thirty feet below, under the threatening face, six other men coolly picked out and set adrift one by one, the timbers not inextricably imbedded.

From time to time the mass creaked, settled, perhaps even moved a foot or two; but always the practised rivermen, after a glance, bent more eagerly to their work.

* * * Suddenly the six men below the jam scattered.

* * * holding their peaveys across their bodies, they jumped lightly from one floating log to another in the zig-zag to shore.

* * * [Illustration: Fig.18.Log Jam.