an opportunity of examining the messenger

We live in such a world of wickedness and fraud, that a man cannot be too vigilant in his own defence: had I employed such spies from the beginning, I should in all probability have been at this day in possession of every comfort that renders life agreeable. The duenna, thus authorised, employed her sagacity with such success, that I had reason to suspect the German of a design upon the heart of Serafina; but, as the presumptions did not amount to conviction, I contented myself with exiling him from my house, under the pretext of having discovered that he was an enemy to the Catholic church; and forthwith appointed a day for the celebration of my daughter’s marriage with Don Manuel de Mendoza. I could easily perceive a cloud of melancholy overspread the faces of Serafina and her mother, when I declared these my resolutions; but, as they made no objection to what I proposed, I did not at that time enter into an explanation of the true motives that influenced my conduct. Both parties were probably afraid of such expostulation.
Meanwhile, preparations were made for the espousals of Serafina; and, notwithstanding the anxiety I had undergone, on account of her connexion with the German, I began to think that her duty, her glory, had triumphed over all such low-born considerations, if ever they had been entertained; because she, and even Antonia, seemed to expect the ceremony with resignation, though the features of both still retained evident marks of concern, which I willingly imputed to the mutual prospect of their separation. This, however, was but a faithless calm, that soon, ah! too soon, brought forth a tempest which hath wrecked my hopes.
Two days before the appointed union of Don Manuel and Serafina, I was informed by the duenna, that, while she accompanied Antonia’s waiting-maid at church, she had seen her receive a billet from an old woman, who, kneeling at her side, had conveyed it in such a mysterious manner, as awakened the duenna’s apprehensions about her young lady; she had therefore hastened home to communicate this piece of intelligence, that I might have an opportunity of examining the messenger before she could have time to deposit her trust. I could not help shivering with fearful presages upon this occasion, and even abhorring the person to whose duty and zeal I was beholden for the intelligence, even while I endeavoured to persuade myself that the inquiry would end in the detection of some paltry intrigue between the maid and her own gallant. I intercepted her in returning from church, and, commanding her to follow me to a convenient place, extorted from her, by dint of threats, the fatal letter, which I read to this effect:—
“The whole business of my life, O divine Serafina! will be to repay that affection I have been so happy as to engage. With what transport then shall I obey your summons, in performing that enterprise, which will rescue you from the bed of a detested rival, and put myself in full possession of a jewel which I value infinitely more than life! Yes, adorable creature! I have provided everything for our escape, and at midnight will attend you in your own apartment, from whence you shall be conveyed into a land of liberty and peace, where you will, unmolested, enjoy the purity of that religion you have espoused, and in full security bless the arms of your ever faithful, ORLANDO.