This catalogue was published to supplement Hofstede de Groot's 1928 catalogue raisonné of van Huysum's work. The book is divided into three sections. The first part is comprised of pictures traced and identified with those in Hofstede de Groot's catalogue; pictures traced which do not appear in de Groot or which cannot be identified with his numbers; and pictures catalogued by de Groot for which the present whereabouts are unknown. Part II contains corrections to former attributions and Part III lists the artist's drawings.