Until the close of her long life of eighty-four years, Lady Huntingdon retained much of that vigour of intellect which had marked the whole of her career. In spiritual life also she continued to develop year by year. In a letter written to an old ministerial friend on April 26, 1790, she says, "Here (in my heart) every wild and warm imagination, intoxicated by pride and self-love, must end; and submit, not only to learn of the poorest and most afflicted Man in our nature, but also to find in Him, and in Him alone, a suitable relief for all our misery; and, through the same medium, a free access to all divine and heavenly wisdom, whenever a sense of our own evil renders us sufficiently conscious of our wants. Thus faith, that faith which is the substance or subsistence of things hoped for, the evidence of things not seen, must carry the day; and by it walking in the light, as God is in the light, the blood of Jesus Christ cleanses us from all sin; while His heavenly and Divine Spirit, daily carrying us forward, leads us experimentally into those various states which He Himself has declared to be truly blessed." The decay of her bodily powers was hastened by the breaking of a blood-vessel in November, 1790. During the ensuing illness at her house next door to Spa Fields Chapel she said to Lady Ann Erskine, who was continually with her, "I am well, all is well--well for ever; I see wherever I turn my eyes, whether I live or die, nothing but victory." From this attack she partially recovered, and for months she lingered in a weakened state, eager up to the last for the extension of her Master's kingdom. About a week before her death she was confined to her bed, and during this time she was greatly interested in a scheme for sending missionaries to the South Seas. Lady Ann Erskine and the other watchers, who were unremitting in their attentions, heard her praying day and night, and saying at one time, "I am reconciled in the arms of love and mercy;" and at another, "I long to be at home; oh, I long to be at home!" Only an hour before her death she asked, "Is Charles' letter come?" referring to a request that had been sent to the Rev. Thomas Charles of Bala, asking him to come and preach at Spa Fields. Almost the last words that fell from her lips were a testimony to the strength and clearness of her faith: "My work is done--I have nothing to do but to go to my Father." Soon after saying these words, on June 17, 1791, she "fell asleep in Jesus." She was buried in the family vault at Ashby de la Zouch.