 Though she considered orthodox Islam "dry as the dune, hard as the gravel," she responded to the "sincere hunger for things of the spirit" in the Sufi mystics and wrote for them "The Way of the Sevenfold Secret" as a devotional guide based on the seven "I am" statements found in the Gospel of John.Confined to bed during her last years, Trotter devoted herself to prayer, writing, and sketching while continuing to manage the affairs of the Algiers Mission Band as best she could.As her body failed, her mind remained clear, even at the end asking prayer for the strength to dictate a letter to Amy Carmichael of India, with whom she had regular correspondence.