The last syllable, _bog,_ is obviously, therefore, a mere corruption of the Saxon _Burgh,_ which we find in the various transmutations of _Burgh, Burrow, Brough, Bruff, Buff,_ and _Boff,_ which last approaches very near the sound in question -since, supposing the word to have been originally _borgh,_ which is the genuine Saxon spelling, a slight change, such as modern organs too often make upon ancient sounds, will produce first _Bogh,_ and then, _elisa H,_ or compromising and sinking the guttural, agreeable to the common vernacular practice, you have either _Boff_ or _Bog_ as it happens.