Complex sentence: This work contained indiscreet disclosures and predictions which were not fulfilled, which the enemy took advantage of, a wag took occasion to remark that the title ought to be read thus: "Les Intérêts de l'Angleterre mal entendus par l'abbé Dubos".
Split into simpler sentences: This work contained indiscreet disclosures and predictions which were not fulfilled. The enemy took advantage of the work, and a wag took occasion to remark that the title ought to be read thus: "Les Intérêts de l'Angleterre mal entendus par l'abbé Dubos".