The exclave comprised a area of north-central Muswell Hill, and occupied the east side of Hatch Lane from Muswell Hill Broadway as far north as the present Goodwyns Vale. Back then, it was parkland and contained the ancient Mus Well. In the Middle Ages, Clerkenwell Priory had charge of a chapel and shrine here of "Our Lady of Mus Well", hence the exclave. This was absorbed by Middlesex in 1899, having been built over and the well destroyed the previous year (it was at 40 Muswell Road). The ancient Middlesex parish of Hornsey had two small exclaves in the south-east corner of the parish of Stoke Newington, which were included in the South Hornsey Local Board in 1865. The formation of the County of London left these as enclaves within it, which were inherited by the South Hornsey Urban District in 1894. Then the whole of South Hornsey passed to the County of London in 1900. One exclave was a narrow strip of land, , from Newington Green along the west side of Albion Road to just short of Clissold Crescent. The other was an irregular shape of made up of two quadrilaterals meeting at the junction of Allen Road and Neville Road, one occupying the area bounded by Matthias Road, Milton Road, Allen Road and Cowper Road, the other between Nevill Road and Stoke Newington Road. The County of London inherited the two riparian semi-enclaves of North Woolwich from Kent (q.v.), and these were abolished when the Borough of Newham was created in 1965. Monmouthshire The county had no exclaves after 1844, and one was abolished then (pre-1844 total 1, legal 1; post-1844 total 1, legal 1): Welsh Bicknor, parish transferred to Herefordshire. Montgomeryshire The county had one exclave after 1844 (pre-1844 total 1 legal 1; post-1844 total 1, legal 1): Bausley (1). The township of Bausley forms a Welsh salient into Shropshire, and had a small exclave comprising a farm called Stanford which was transferred to the latter county. There was a serious proposal to transfer Bausley to Shropshire in 1887, but the parish exclave was transferred to Wollaston instead. Bausley, including the exclave, remain in the Church of England parish of Alberbury. Riparian semi-exclaves: The border with Shropshire between Llanymynech and Melverley (the Welsh-English border) runs along the River Vyrnwy, but this river meanders at will. Dropped meanders mean that there are six riparian semi-enclaves of Montgomeryshire,