Blanket supposedly used to restrain violent inmates

Blanket supposedly used to restrain violent inmates. Probably from the 19th or early 20th century; found around 1930 in a chest in the cellar at Hanwell Asylum, the asylum on the outskirts of London whose superintendant, John Conolly (1794-1866), famously renounced all instruments of mechanical restraint in favor of 'moral treatment,' that is, regular labour under constant close surveillance.