In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Llanfihangel Glyn Myfyr like this:
LLANFIHANGEL-GLYN-MYFYR, a parish in the district of Corwen and counties of Merioneth and Denbigh; on the river Allwen, 6½ miles NW of Corwen r. station. Post town, Corwen. The Merioneth portion consists of Cefnpost township; and the Denbigh portion comprises the townships of Gysulog, Llysan, and MaesyrOdyn. ...
Acres of the M. portion, 3,538; of the D. portion, 664. Rated property of the whole, £1,920. Pop. of the M. portion, 70; of the D. portion, 394. Houses, 1 6 and 67. The property is much subdivided. Most of the surface is hill and pasture. The living is a rectory in the diocese of St. Asaph. Value, £215.* Patron, the Bishop of St. Asaph. The church is tolerable. The name Glyn-Myfyr, or Glyn-y-Myvyr, signifies ' ' the vale of meditation, and gave name to Jones's ' ' Myvyrian-Archæology."
Llanfihangel Glyn Myfyr is now part of Conwy district. Click here for graphs and data of how Conwy has changed over two centuries. For statistics about Llanfihangel Glyn Myfyr itself, go to Units and Statistics.
GB Historical GIS / University of Portsmouth, History of Llanfihangel Glyn Myfyr, in Conwy and Denbighshire | Map and description, A Vision of Britain through Time.
Date accessed: 29th April 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 " Llanfihangel Glyn Myfyr ".