He was an inventive, forward-thinking engineer who introduced many new ideas and a higher level of safety to the network. One of his first projects in Ulster was the Quoile viaduct where he introduced interlocking signals, he later developed the signalling staff system which carried his name. As well as routine railway duties he designed numerous stations, a harbour, promenades, footbridges, walks, hotels and one of the major attractions in Ireland, the Gobbins Cliff Walk. When renewing the BNCR line he opened a quarry at Ballymoney with the latest crushing machinery to provide high-grade stone for the track, he also carried out a major extension and refurbishment of York Road Station including the clock tower, concourse, tramway canopy, hotel, freight offices and goods store.