The location is that given by the RCAHMS Canmore database, and corresponds to a farm called "Knockravie" on the modern 1:25,000 map.
A Vision of Britain through Time includes a large library of local statistics for administrative units. For the best overall sense of how the area containing Knockreavie has changed, please see our redistricted information for the modern district of Dumfries and Galloway. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Knockreavie and units named after it.
GB Historical GIS / University of Portsmouth, History of Knockreavie, in Dumfries and Galloway and Wigtownshire | Map and description, A Vision of Britain through Time.
Date accessed: 24th May 2013
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Knockreavie".