Griffiths has suggested that by the mid-fifteenth century, relations between Percy and Neville were 'poisoned by jealousy and resentment.’ Further, he has pointed out that Salisbury probably did not expect- and not receive- the assistance of the Raby branch of his family (by his father's first wife, Margaret Stafford), which he puts down to the previous feud between the two branches of the family over the division of Westmorland's will. Robin Storey has also pointed out how Northumberland seems to have been receiving less royal favour than Salisbury. He points out however, that when trouble came, it was to be the earls' sons, not the lords themselves, that would start it.