Complex sentence: York had abandoned not only his troops but also his wife Cecily Neville, Duchess of York, his two younger sons George and Richard and his youngest daughter Margaret, who were found standing at the Ludlow Market Cross when the Lancastrians arrived.
Split into simpler sentences: York had abandoned not only his troops but also his wife Cecily Neville, Duchess of York, his two younger sons George and Richard and his youngest daughter Margaret. By popular account, they were found standing at the Ludlow Market Cross when the Lancastrians arrived.