The top of the spire is usually capped with a weather vane terminating in a cock. The custom of using a cock as the flag of the vane is of very early date, for Wolfstan, in his Life of S. Ethelwold, written towards the end of the 10th century, speaks of one which surmounted Winchester Cathedral. In the Bayeux Tapestry one is shown on the gable of Westminster Abbey, and one of the early Popes ordained that every church under the papal jurisdiction should be surmounted by a cock as emblematical of the sovereignty of the church over the whole world. CHAPTER XI. STAINED GLASS. The use of coloured glass in the windows of buildings devoted to religious purposes appears to have been employed as early as the ninth century, but no examples remain of anything like so old a date, and we have only illuminated missals and primitive drawings by members of the conventual bodies to guide us in determining the earliest styles of coloured glazing. It appears to have consisted of more or less primitive representations of the human form, with strong black lines to indicate the features and folds of the drapery. The backgrounds were generally masses of deep blue or red, and in the rare instances where landscapes were introduced positive colours only appear to have been used. Our oldest specimens in England are those in the choir aisles of Canterbury Cathedral, which appear to be of the 12th century, and it is thought that they are the remains of the original glazing that was put in when this part of the building was rebuilt after a fire in 1174. The general design is composed of panels of various forms, in which are depicted subjects from Holy Scripture, with backgrounds of deep blue or red; the spaces between the panels are filled with mosaic patterns in which blue and red colours predominate, and the whole design is framed in an elaborate border of leaves and scroll-work in brilliant colours. [Illustration: A Parish Church with a Shingle Broach Spire. (_See page 99_). Edenbridge, Kent. _Homeland Copyright._] Of thirteenth century windows we have some magnificent examples --unfortunately few unmutilated--as at York, where is the five-light lancet window situated in the north end of the transept, known as the Five Sisters of York. Of this date, also, are the large circular window of Lincoln Cathedral, and the windows at Chetwode, Bucks; Westwell, Kent; West Horsley, Surrey; and Beckett's Crown, Canterbury.