The order was first introduced into England in the reign of Henry I., at Clerkenwell; which continued the principal house of the order in England, and was styled the Hospital. The Hospitallers had also dependent houses, called Commanderies, on many of their English estates, to the number of fifty-three in all. The houses of the military knights in England were only cells, erected on the estates with which they had been endowed, in order to cultivate those estates for the support of the order, and to form depôts for recruits; _i.e._ for novices, where they might be trained, not in learning like Benedictines, or agriculture like Cistercians, or preaching like Dominicans, but in piety and in military exercises. A plan and elevation of the Commandery of Chabburn, Northumberland, are engraved in Turner's "Domestic Architecture," vol. iii. p. 197. The superior of the order in England sat in Parliament, and was accounted the first lay baron. When on military duty the knights wore the ordinary armour of the period, with a red surcoat marked with a white cross on the breast, and a red mantle with a white cross on the shoulder. Some of their churches in England possibly had circular naves, like the church of the Temple in Jerusalem; out of the four "round churches," which remain, one belonged to the Knights of the Hospital. The chapel at Chabburn is a rectangular building. There were many sisters of the order, but only one house of them in England. One of two earlier representations of knights of the order may be noted here. In a MS. in the Library at Ghent, of the date of our Edward IV., is a picture of John Lonstrother, prior of the order; he wears a long sleeveless gown over armour. It is engraved in the "Archælogia," xiii. 14. The MS. Add. 18,143 in the British Museum is said in a note at the beginning of the volume to have been the missal of Phillippe de Villiers de l'Isle Adam, the famous Grand Master of the Order of St. John of Jerusalem from 1521 to 1534. In the frontispiece is a portrait of the Grand Master in a black robe lined with fur, and a cross patee on the breast. On the opposite page is another portrait of him in a robe of different fashion, with a cross rather differently shaped. The monument of the last English Prior, Sir Thomas Tresham, in his robes as prior of the order, still remains in Rushton Church, Northants. A fine portrait of a Knight of Malta is in the National Gallery. The Hospitaller given on the preceding page, from Hollar's plate, is a (not very good) representation of one in the armour of the early part of the fourteenth century, with the usual knight's _chapeau_, instead of the mail hood or the basinet, on his head. [Illustration: _A Knight Hospitaller._]