In heraldry, a double quatrefoil, which has this many leaves, actually represents a ninth son
as a heraldic beast, has a hooked nose ... equivalent in heraldry to 
white or gray; in crosshatching represented as plain white ... 9) ninth son: double 
quatrefoil ..... a shield shape, voided, following the curve of the shield edge but 
not actually... [DOC] [TLE] Dictionary entries | Mistholme | Page 3 [PAR]