In 1792 she removed to Paris, where she became acquainted with Gilbert Imlay, of the United States. And from this acquaintance grew an attachment, which brought the parties together, without legal formalities, to which she objected on account of some family embarrassments, in which he would thereby become involved. The engagement was however considered by her of the most sacred nature, and they formed the plan of emigrating to America, where they should be enabled to accomplish it. These were the days of Robespierrean cruelty, and Imlay left Paris for Havre, whither after a time Mary followed him. They continued to reside there, until he left Havre for London, under pretence of business, and with a promise of rejoining her soon at Paris, which however he did not, but in 1795 sent for her to London. In the mean time she had become the mother of a female child, whom she called Frances in commemoration of her early friendship. Before she went to England, she had some gloomy forebodings that the affections of Imlay, had waned, if they were not estranged from her; on her arrival, those forebodings were sorrowfully confirmed. His attentions were too formal and constrained to pass unobserved by her penetration, and though he ascribed his manner, and his absence, to business duties, she saw his affection for her was only something to be remembered. To use her own expression, "Love, dear delusion! Rigorous reason has forced me to resign; and now my rational prospects are blasted, just as I have learned to be contented with rational enjoyments." To pretend to depict her misery at this time would be futile; the best idea can be formed of it from the fact that she had planned her own destruction, from which Imlay prevented her. She conceived the idea of suicide a second time, and threw herself into the Thames; she remained in the water, until consciousness forsook her, but she was taken up and resuscitated. After divers attempts to revive the affections of Imlay, with sundry explanations and professions on his part, through the lapse of two years, she resolved finally to forgo all hope of reclaiming him, and endeavour to think of him no more in connexion with her future prospects. In this she succeeded so well, that she afterwards had a private interview with him, which did not produce any painful emotions.