In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Erbistock like this:
ERBISTOCK, a parish in the district of Wrexham, and counties of Denbigh and Flint; on the river Dee, 4¼ miles ESE of Ruabon r. station, and 5 NW of Ellesmere. Post town, Overton, under Wrexham. Acres of the Denbigh portion, 1, 559. Real property, £1, 700. Pop., 227. Houses, 50. Acres of the Flint portion, 43. ...
Real property, £1, 053. Pop., 110. Houses, 24. The property is divided among a few. The manor belonged to Bangor priory. Erbistock Hall is the seat of W. Brancker, Esq. The living is a rectory in the diocese of St. Asaph. Value, £254.* Patron, the Bishop of Llandaff. The church is tolerable.
GB Historical GIS / University of Portsmouth, History of Erbistock, in Wrexham and Denbighshire | Map and description, A Vision of Britain through Time.
Date accessed: 23rd March 2017
Click here for more detailed advice on finding places within A Vision of Britain through Time , and maybe some references to other places called " Erbistock ".