References in classic literature ?
At other times, he turns the traps bottom upwards, by the same means, and occasionally even drags them to the barrier and conceals them in the mud.
Thus the high importance of barriers comes into play by checking migration; as does time for the slow process of modification through natural selection.
The great and striking influence which barriers of every kind have had on distribution, is intelligible only on the view that the great majority of species have been produced on one side alone, and have not been able to migrate to the other side.
But how will you pass through the barrier without exciting suspicion?
Raoul was as calm as if he were handling a foil, instead of a sword; having retreated a step, he parried three or four fierce thrusts which De Wardes made at him, caught the sword of the latter within his own, and sent it flying twenty paces the other side of the barrier.
The assailants have won the barriers, have they not?
I see him now; he leads a body of men close under the outer barrier of the barbican.
For another two hours we were occupied in traversing a few hundred yards to the foot of the barrier.
The marshal thought this barrier not so well fortified as the others and determined to break through it.
The barrier between you is her experience of sorrow and trouble.
With great leaps and bounds he came, straight toward the arena wall directly beneath where we sat, and then accident carried him, in one of his mighty springs, completely over the barrier into the midst of the slaves and Sagoths just in front of us.
And so we say good-bye in this, our last message to the world beyond the barrier cliffs.