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THELWALL, JOHN. A Letter to Henry Cline, Esq., on Imperfect Developments of the Faculties, Mental and Moral, as well as Constitutional and Organic;
THELWALL, JOHN. A Letter to Henry Cline, Esq., on Imperfect Developments of the Faculties, Mental and Moral, as well as Constitutional and Organic; and on the Treatment of Impediments of Speech. 8vo, contemporary 1/2 russia, front cover detached, rear joint cracked; front free endpaper loose, first 20 pages defaced with early owner's repeated small vertical ink strokes but legibility unimpaired. London, 1810
- Notes: first edition. "The first book on mental deficiency. Thelwall recognized that sensory deprivation could be a cause of apparent mental defect through his work with handicapped children. He established criteria for distinguishing between intellectual capability and performance"--Garrison-Morton 4969.2. Hunter & Macalpine, pages 656-57.
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