Yorkshire a third part. The three ridings in Yorkshire were named the East Riding, West Riding and North Riding. The East and North Ridings of Yorkshire were separated by the River Derwent and the West and North Ridings were separated by the Ouse and the Ure/Nidd watershed. In 1974 the three ridings of Yorkshire were abolished and York, which had been independent of the three ridings, was incorporated into the new county called North Yorkshire. It later became part of York Unitary Authority. For statistical purposes, Yorkshire is divided, as of 2018, between three regions of England. Most of the county
Iffa and Offa West was built by order of King John around 1186 to guard another crossing of the River Suir. A bridge was started soon after the castle was completed. When County Tipperary was split into North and South Ridings in 1836, Iffa and Offa West was allocated to the south riding. However, the neighbouring barony of Kilnamanagh was split into Upper and Lower half-baronies, being allocated to the north and south ridings respectively. The barony is set in that part of the Suir valley where the river makes a 90° turn to the east. The Knockmealdown Mountains rise abruptly to the south,