...“None that I know of, my boys; and it must act as a preventative to the opening out of this grand country to civilisation, unless man can improve these poisonous little pests off the face of the earth... 
George Manville Fenn 「Off to the Wilds」
... I believe, my dear friends, that I have given you a sufficient preventative against all these follies...
Jean Meslier Anna Knoop 「Superstition In All Ages (1732)」
...Heavygusts of wind were constantly sweeping the valley, and filling the airwith sand, and the flies were so numerous and troublesome that they werea preventative to all work...
Charles Sturt 「Expedition into Central Australia」
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