comprised Chester Castle and some adjoining territory. The situation remained until 1974, the city having become a county borough in 1888. The territory remains a civil parish, with no inhabitants (2020). Riparian semi-exclaves: River Dee. The border with Denbighshire between Aldford and Shocklach (the Welsh-English border) runs along the River Dee, but this river meanders at will. Dropped meanders mean that there are three riparian semi-enclaves of Cheshire near Shocklach. These have been left alone. River Mersey. The border with Lancashire ran along the River Mersey, but the river had many meanders and was liable to change its course. This left many portions of both counties on the wrong side of it. Most of the border has been superseded, but a portion remains between the boroughs of Stockport and Tameside south of Denton, and this still illustrates the problem. Cornwall The county had one riparian semi-exclave after 1844: Saltash. Historically the county has had only one detached portion, a riparian semi-exclave on the east, Devon side of the estuary of the River Tamar estuary opposite Saltash. This meant that the ancient ferry there had both ends in Cornwall. The area belonged to Saltash, St Stephen parish, but was transferred to St Budeaux parish and Devon after 1844. Denbighshire The county had two exclaves and three semi-exclaves after 1844, and one abolished then (pre-1844 total 6, legal 2; post-1844 total 5, legal 1): Llandrillo yn Rhos (5) The major semi-exclave of Caernarfonshire (see above) contained a semi-exclave of Denbighshire including the east part of Old Colwyn. This in turn had two satellite semi-exclaves north of Penmaen-Rhôs, separated by a very narrow corridor. In addition, it was accompanied by two small satellite exclaves forming thin strips south-east of Old Colwyn. This total of five detached portions of Denbighshire, , belonged to the parish of Llandrillo yn Rhos. It was annexed to the semi-enclave of Caernarfonshire in 1879. One exclave was abolished in 1844: Carreghofa (1). The township of Carreghofa was on the English border, and included the Welsh half of the divided village of Llanymynech. Riparian semi-exclaves: The River Dee formed the border from near Chester to near Chirk, but was liable to change course and drop meanders. As a result, there were two riparian semi-exclaves on the border with the exclave of Flintshire known as English Maelor: By Althrey Hall in Flintshire, one of a pair of lost meanders and so