1843—
Summer on the Lakes, in 1843
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“Townshend, speaking of the effect of gems on one of his sleep-wakers, said, she loved the diamond so much that she would lean her forehead towards it, whenever it was brought near her.”
Fuller, Margaret. Summer on the Lakes, in 1843. Boston: Little, Brown & Co., 1844.
Inferred Fuller cites 'Townshend' by name in reference to his mesmeric experiments with gems on sleep-wakers.