They were mostly farming people who didn't suffer fools gladly and went in for plain speaking.
Anyone who rambled on with little point to their conversations was called a blether, meaning they talked excessively and not always with anything interesting to say.
A Blether : someone who talks excessively, usually without purpose or relevance.
Anything said by such people was classed as 'blethering' as in.......
"I met her in the street and thought she'd never stop blethering."
Now this isn't to be confused with 'blithering' which I only know of as a word that's put before 'idiot' when used to describe someone of low intelligence.
"He's a blithering idiot."
It's not a phrase used much these days as sadly it seems to me that blithering has been replaced by the F word most times.
But as that's not the point of this post, I'll go now or else I'll be accused of being a blithering blethering idiot.