To this period belong famous potters, such as P. J. Van Kessel of "The Metal Pot"; Abram de Kooge of "The Old Moor's Head," who decorated landscapes in blue _camaïeu_; and Albrecht de Keizer, with his two sons-in-law, Jacob and Adrian Pynaker, of "The Three Porcelain Bottles," who were the first to imitate oriental porcelain. Other potters of note at this time were the Eenhorns, father and two sons, the Kleftyns, and the five Kams. [Illustration: FIG. 99.--CRUCHE.] By the middle of the 18th century, owing to the competition of English pottery, the Delft industry was already on the wane. In 1780 the factories were reduced to one half their former number, and by 1808 only seven existed. All these gradually succumbed, and now only one factory, "The Old Porcelain Bottle," remains. [Illustration: FIG. 100.--TEAPOT.] The forms of the Delft ware are very varied; among other curious efforts the potters produced musical instruments. There are four fayence violins extant, all painted in blue _camaïeu_, with figures in Dutch costume of the 17th century, dancing and singing, musicians and kermess scenes, in the manner of Gerard Lairesse, with cupids and Renaissance ornaments as borders. The decorated pieces of Ter Himpelen, although rarely signed, are much prized; he painted fairs and marine subjects on square plaques, about the year 1650. So also are those of Piet Viseer, a celebrated colourist, who flourished about 1750; and of Van Domelaar, who painted Chinese landscapes, &c., about 1580. [Illustration: FIG. 101.--VASE.] Fig. 99, a cruche, is painted in blue _camaïeu_, with a musical party, in the costume of about 1670. [Illustration: FIG. 102.--PLATE.] Fig. 100, a teapot, is painted in polychrome with Chinese landscapes and flowers on a black ground. It has the mark of Louwys Fictoor. Late 17th or early 18th century. Fig. 101, a vase, is painted in blue with flowers, in imitation of a Chinese type. The mark of Ghisbrecht Lambrechtse Kruyk. Later half of 17th century. Fig. 102, a plate painted with figures in blue, is one of a set of twelve representing the tobacco industry. UTRECHT. There was a manufactory of tiles here, founded in 1760; they were decorated in blue or violet, _en camaïeu_, in imitation of Delft; the manufactory was closed in 1855. AMSTERDAM. A German Jew of Breslau, named Hartog, known as Hartog Van Laun, and another, named Brandeis, established a manufactory of fayence near the gate of Weesp, at Amsterdam. The ware is heavy, not very artistic, and usually in blue _camaïeu_. Fig. 103, a fruit dish, is painted in blue, with a man and woman seated. [Illustration: FIG. 103.--DISH.]