e embankment. In swift streams this embankment is built so as
to arch against the current, thus securing additional strength,
and evincing an instinct on the part of the animal which amounts
almost to reason. In cutting down the trees the beaver gnaws a
circular cut around the trunk, cutting deepest on the side toward
the water, thus causing the trunk to fall into the stream. The
first step in constructing the embankment is to lay the logs down
cautiously in the required line of the dam, afterwards weighting
them with heavy stones, which the beavers by their united efforts
roll upon them. The foundation of the embankment is often ten feet
in width, and is built up by continued heaping of branches, stones
and mud, until it forms a barrier of immense strength and resisting
power. In many cases, through a lapse of years, and through a
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consequent accumulation of floating leaves, twigs, and seeds of plants,
these embankments become thickly covered with vegetation, and, in many
cases in the Hudson Bay country, have even been known to nurture trees
of considerable dimensions. The broad flat tail of the animal serves a
most excellent purpose, in carrying the mud to the dams or huts, and
in matting and smoothing it into a solidity.

[Illustration]

The entrances to the various huts are all beneath the water, and
they all open into one common ditch, which is purposely dug in
the bed of the river, and is too deep to be entirely frozen. In
the summer time the huts are vacated, and the beavers make their
abode in burrows on the banks of the stream, which serve as a secure
retreat at all times, and particularly in winter when their houses
are molested. The Indians of the Northwest are aware of this fact,
and turn it to good account in the capture of the animals.

When the beaver's village is in a small creek, or brook, it is
first necessary to stake the water across both above and below
the huts. The next thing is to ascertain the exact spots of the
burrows in the banks, and when we consider the river is covered
with ice, this seems a rather difficult problem. But this is where
the Indian shows his skill. He starts upon the ice, provided with
an ice chisel secured to a long, stout handle. With this he strikes
upon the ice, following the edge of the stream. The sound of the
blow determines to his practiced ear the direct spot opposite the
opening of the burrows, and at this point a hole a foot in diameter
is made throu