A similar school to that in Amsterdam arose in Middelburg, the capital of Zeeland, led by Jacob Cats (1577–1660). In Cats the genuine Dutch habit of thought, the utilitarian and didactic spirit reached its zenith of fluency and popularity. During early middle life he produced the most important of his writings, his didactic poems, the "Maechdenplicht" ("Duty of Maidens") and the "Sinne- en Minnebeelden" ("Images of Allegory and Love"). In 1624 he moved from Middelburg to Dordrecht, where he soon after published his ethical work called "Houwelick" ("Marriage"); and this was followed by an entire series of moral pieces. Cats is considered somewhat dull and prosaic by some, yet his popularity with the middle classes in the Netherlands has always been immense.