I have asked one or two questions about -ておる for -ている before, and I have a few notes, but now I feel a bit confused. In the book I'm reading, one character who uses -ておる is supposed to be a coarse and uneducated rural type, I suppose in his thirties or forties, and another character who uses -ておる is a refined and educated headmaster, an old man. I have a note somewhere that -ておる is dialect, and another nore that it is old person's speech. These would fit the respective characters, but are they different types of use? Or is there essentially only one type of use of -ておる?