“ Some time in May 1603 Percy angrily declared his intention to Catesby of killing the king, and in April 1604 he met Catesby with John Wright, Thomas Winter and Guy Fawkes, and was then initiated into Catesby's gunpowder plot, which met with his zealous approval and support. To Percy was allotted the special duty after the explosion of seizing the infant prince Charles and riding off with him on his saddle to Warwickshire. ”