Anselmo’s ill-advised experiment is the tragic center of the embedded tale commonly called The Ill-Advised Curiosity: a husband who wants certainty about his wife’s fidelity arranges for his closest friend, Lothario, to test her. The test does not settle Anselmo’s doubts so much as create the conditions for betrayal, concealment, and a fatal misunderstanding. Its decisive irony is that Anselmo takes a carefully staged appearance as proof of truth, while the experiment he designed to secure his honor ultimately brings about his ruin.

The Experiment and Its Fatal Premise

Anselmo entrusts Lothario with making advances to Camilla, his wife, and has come to believe that she has resisted them. Lothario, however, tells him that Camilla has yielded and agreed to meet him in the closet where Anselmo keeps his jewels. He claims to have delayed revealing this because he wanted to determine whether her promise was serious, and advises Anselmo not to rush into punishment. Instead, Anselmo should pretend to leave for two or three days and hide among the tapestries in the closet, where he can observe what happens for himself.

The proposal gives Anselmo exactly the kind of direct proof he seeks: he can watch without being seen and judge Camilla’s conduct with his own eyes. Lothario presents concealment as a means of mature deliberation, but his advice places Anselmo inside a scene whose apparent evidence will be deliberately arranged. Anselmo accepts the plan, trusting the friend whose conduct has already compromised the marriage and whose account he takes as the basis for his judgment.

Camilla Turns Observation into a Performance

When Lothario tells Camilla what he has promised Anselmo, she rebukes him for his jealous anger and reckless decision. She understands that Anselmo will be hidden in the closet and devises a way to use that concealment to preserve the appearance of her fidelity. She does not explain the whole plan to Lothario in advance; she instructs him to answer her questions as though he did not know that Anselmo was listening.

With Anselmo behind the tapestries, Camilla draws a line on the floor with a dagger and warns Lothario not to cross it. She questions him about his knowledge of her husband and of herself, then presents herself as defending Anselmo’s honor against Lothario’s supposed designs. Lothario understands the scheme and plays his part. Camilla makes the exchange look more convincing by pretending to attack him with the dagger. When she cannot wound him, she inflicts a slight wound on herself and falls as if fainting. Lothario and Leonela respond as though a terrible accident has occurred, completing the scene for the hidden observer.

The performance reverses the meaning of Anselmo’s test. He has arranged to witness an unguarded truth, but what he sees has been composed for his benefit. Camilla’s staged resistance convinces him that she is faithful; Lothario’s participation makes the deception credible, and the supposed proof becomes a new source of trust rather than a warning. The plot’s central turn lies in this gap between observation and knowledge: seeing the scene does not enable Anselmo to understand it.

False Reassurance and the Collapse of the Secret

Afterward, Anselmo leaves the house to find Lothario and celebrates the result of the supposed test. He embraces his friend and praises Camilla, believing that Lothario has helped establish her purity. He even speaks of making verses that will preserve her name, while Lothario, unable to share his joy, remains aware of the deception and of the wrong he has done his friend. Anselmo reads Lothario’s lack of pleasure as distress about Camilla’s wound, which he believes to be slight and safely concealed.

The arrangement persists for a time. Anselmo himself leads Lothario home by the hand, joining the husband to the man who has, in fact, betrayed him. Camilla receives Lothario with an outwardly averted countenance, while the secret relationship continues behind the public appearance of reconciliation. The contrast between Anselmo’s confidence and the concealed reality turns the apparent success of the experiment into its most dangerous consequence: he trusts more completely because he believes he has tested trust.

The deception is eventually exposed through a separate breach in the household’s secrecy. Leonela has been concealing her own lover in the house, and Lothario sees a man leaving at daybreak. He initially takes the departing figure for a spectre, then suspects that Camilla has been unfaithful with someone else. In jealousy, he tells Anselmo that Camilla has yielded to him and proposes the concealed observation that produces the staged scene. Later, Anselmo locks Leonela in a room and demands that she explain what she knows. Camilla fears that Leonela will disclose her faithlessness, packs her most valuable jewels and some money, and escapes to Lothario. He takes her to a convent where his sister is prioress, then leaves the city without telling anyone where he is going.

Deaths and the Meaning of the Ending

The next morning Anselmo discovers Leonela’s escape, the knotted sheets she used to leave through the window, and Camilla’s absence. The open boxes and missing jewels make him understand that Leonela was not the cause of his misfortune. He goes to a friend’s house, pale and exhausted, asks to be left alone with writing materials, and begins a statement explaining the cause of his end. Before he can complete it, he dies, partly on the bed and partly over the writing table, the unfinished paper and pen beside him.

The surviving lines of his declaration acknowledge that a foolish desire has cost him his life. He says that Camilla should be forgiven because she was not bound to perform miracles and he should not have required them of her; he recognizes that he himself has been the author of his dishonor. The sentence breaks off before the thought is finished, leaving his recognition as a late, incomplete reckoning rather than a recovery of what the experiment destroyed.

Camilla does not leave the convent after hearing of Anselmo’s death. She remains there until news arrives that Lothario has been killed in a battle in the Kingdom of Naples. Only then does she take the veil; she dies not long afterward, worn out by grief and melancholy. The embedded tale closes by tracing all three deaths back to a thoughtless beginning. Its tragic logic is not that fidelity can never be known, but that Anselmo’s demand for impossible certainty turns intimate trust into a trial, and that appearances manufactured to satisfy him postpone recognition until it can no longer repair the damage.