Le Livre de Seyntz Medicines

Le Livre de Seyntz Medicines is a fourteenth-century devotional treatise written by Henry of Grosmont, 1st Duke of Lancaster around 1354. It is a work of allegory in which he describes his body as under attack from sin: his heart is the castle, and sin—in all its forms—enters his body via wounds, and against which he begs the assistance of the necessary doctor, Jesus Christ. It exists in two complete copies today, both almost identical in language although with different bindings. One of these copies is almost certainly a surviving copy from Grosmont's family, although their provenance is obscure.