https://books.google.com/books?id=yFsw-Vaup6sC&printsec=frontcover
Bede, The Reckoning of Time - Beda (Venerabilis.), Beda Venerabilis (helgon.), el Venerable Beda...
From the patristic age until the Gregorian calendar reform of 1582, computus -- the science of time reckoning and art of calendar construction -- was a matter...
the reckoningof timebeda venerabilisbedehelgon