Botanical paintings by Jacob van Huysum and William Sartorius A volume of botanical watercolour paintings. Many appear in the botanical works of John Martyn, especially in his 'Historia Plantarum Rariorum', and in the Society of Gardeners' 'Catalogus Plantarum' (1730). Mostly unsigned, but attributed to Jacob van Huysum, sometimes also called Jacobus van Huysum. Two are signed William Sartorius. c.1725-1740