Complex sentence: Towards the end of the reign of Edward III (1327--1733) it had passed to John Horsman, and it is likely that he built a large new dwelling and it is after this building that the manor gained its name.
Split into simpler sentences: Towards the end of the reign of Edward III (1327--1733) it had passed to John Horsman, and it is likely that he built a large new dwelling. It is after this building that the manor gained its name.