sentences:  Dean remained at Wolverhampton for the time being, as George's assistant.Because the Great Western now had in effect two independent locomotive works, the scene was set for a difficult personal situation, George Armstrong and William Dean being "de facto" rivals for the post of Joseph's assistant at Swindon.Appointing George would have smacked of nepotism; furthermore, Dean's youth (he was 18 years younger than George) counted in his favour as, in time, a potential successor.