In 1884 the Le Plongeons left Mexico and settled in New York. There, Alice focused on her writing and giving lectures. She published articles and organized her field notes. Alice also became involved in a number of social movements. She was a member of Sorosis, a professional women's organization. She also gave lectures to fund raise for the New York Diet Kitchen Association, an organization which aimed to fed the poor. Alice had a strong interest in Spiritualism, Freemasonry, and the Rosicrucians, and was active in the Theosophical Society.