Several forms of marks of cadency are given in the Book of St. Albans, printed in the fifteenth century, and many more had been used in mediæval times, but the manner of indicating cadency which has lasted until the present day is the only one that it is necessary to describe here.
In an old window at St. Mary's Church, Warwick, the six sons of the Earl of Warwick, who died in the thirty-fourth year of Edward III., are marked by the six following devices on their shields:—
1st, a Label
2nd, a Crescent
3rd, a Mullet or spur rowel, sometimes pierced
