The cross ceased to be a symbol directly associated with the "taking of the cross", the resolve to fight in a crusade, after the failure of the crusades in the 14th century. With the development of systematic heraldry, there was great demand for variations of the cross symbol and associated terminology. Juliana Berners reports that there were "Crossis innumerabull born dayli". The term "St George's cross" was at first associated with any plain Greek cross touching the edges of the field (not necessarily red on white). Thomas Fuller in 1647 wrote of "the plain or George's cross" as "the mother of all the others" (that is, the other heraldic crosses).