Ichthyosis skin condition. The boy is a son of Edward Lambert, the 'porcupine man'. Lambert and his children had a severe form of ichthyosis hystrix, where massive hyperkeratosis (skin thickening) led to the entire body except the face and palms, soles, and genitals, being covered in wart-like cylindrical growths (lower left). This page is from volume 49 (1755-6) of the journal 'Philosophical Transactions', published by the Royal Society of London.
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