Complex sentence: Within two years of his arrival in Hereford, young Standish had quarrelled bitterly with his grandfather, leading to a feud which eventually involved most of the Hartstonge family.
Split into simpler sentences: Within two years of his arrival in Hereford, young Standish had quarrelled bitterly with his grandfather. This led to a feud which eventually involved most of the Hartstonge family.