by the aid of

See: hereby
References in classic literature ?
In the second case, when those who fight are of such a character that you have no anxiety as to who may conquer, so much the more is it greater prudence to be allied, because you assist at the destruction of one by the aid of another who, if he had been wise, would have saved him; and conquering, as it is impossible that he should not do with your assistance, he remains at your discretion.
A trailing bamboo in the Malay Archipelago climbs the loftiest trees by the aid of exquisitely constructed hooks clustered around the ends of the branches, and this contrivance, no doubt, is of the highest service to the plant; but as we see nearly similar hooks on many trees which are not climbers, the hooks on the bamboo may have arisen from unknown laws of growth, and have been subsequently taken advantage of by the plant undergoing further modification and becoming a climber.
During the ensuing days, while the preparations were going forward for the escape of the merchant, the zeal of Felix was warmed by several letters that he received from this lovely girl, who found means to express her thoughts in the language of her lover by the aid of an old man, a servant of her father who understood French.