Dangerous Liaisons by Pierre Choderlos de Laclos

Yes, certainly, I can explain Danceny's letter to you. The incident that gave birth to it is my work, and I think it a masterpiece. I lost no time since I received your last letter; and, in the words of the Athenian architect, "What he has said, I will perform."

There must be obstacles then for our hero of romance; and his happiness lulls him. Oh! leave that to me, I will cut out work for him; and I am much mistaken if he sleeps so quietly hereafter. It was necessary to make him sensible of his folly; and I flatter myself that he now regrets the opportunity he has let slip. You say also, that is necessary there should be a little mystery in the business: well, take my word for it, that shall not be wanting. I have this good quality, that if I am but told my faults, I am not at rest till I amend them. Now to inform you what I have done -- at my return the day before yesterday, in the morning I received your letter, which is truly admirable. Being fully satisfied that you had very well pointed out the cause of the disorder, I set about finding the method of cure. But first I lay down; for the indefatigable Chevalier did not suffer me to take the least repose; and I thought I should sleep: but no; totally taken up with the thoughts of rousing Danceny from his lethargy, or punishing him for it, I could not close my eyes; and it was not until after I had well digested my plan, I got two hours repose.