An old dog barks not in vain. [ English Proverb, collected by George Herbert ]

When the old dog barks he gives counsel. [ Proverb ]

When an old dog barks, one must look out. [ German Proverb ]

And let our barks across the pathless flood
Hold different courses. [ Sir Walter Scott ]

A dog that barks much is never a good hunter. [ Portuguese Proverb ]

The lives of trees lie only in the barks,
And in their styles the wit of greatest clerks. [ Butler ]

A cowardly cur barks more fiercely than it bites. [ Quintus Curtius Rufus ]

That dog barks more out of custom than of care of the house. [ Proverb ]

Codes are treacherous seas in which the poor barks of smugglers perish, while big corsairs traverse them under full sail. [ E. Souvestre ]

Earth has scarcely an acre that does not remind us of actions that have long preceded our own, and its clustering tombstones loom up like reefs of the eternal shore, to show us where so many human barks have struck and gone down. [ Chapin ]