 Unlike the other historic periods of Gothic architecture, this style permitted him to vary the design of the tracery from window to window.This was far more time-consuming and costly than designing in the Early English or even the Perpendicular style, but it gave free rein to Blacket's creativity and skills as a draughtsman.During his time spent in Yorkshire during his youth, Blacket would have become familiar with two of the most famous of all Flowing Decorated windows in England, the west window of York Minster and the east window of Selby Abbey.