In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described The Boundary like this:
BONDARY, or Barton-Road, an extra-parochial tract in the district of Ashby-de-la-Zouch and county of Derby; 2 miles N of Ashby-de-la-Zouch. Pop., 52. Houses, 9.
The Boundary is now part of South Derbyshire district. Click here for graphs and data of how South Derbyshire has changed over two centuries. For statistics about The Boundary itself, go to Units and Statistics.
GB Historical GIS / University of Portsmouth, History of The Boundary in South Derbyshire | Map and description, A Vision of Britain through Time.
Date accessed: 26th 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 " The Boundary ".