Complex sentence: In fact Percy's father, once summoned, refused permission; and the son was quickly and unhappily married to Lady Mary Talbot, daughter of the Earl of Shrewsbury, by early 1524 or in 1525 with earlier legal stages.
Split into simpler sentences: In fact Percy's father, once summoned, refused permission for the match. Henry was quickly and unhappily married to Lady Mary Talbot, daughter of the Earl of Shrewsbury, by early 1524 or in 1525 with earlier legal stages.