unburden oneself to

unburden oneself to someone

Fig. to tell someone about one's trouble or anxiety. I didn't mean to unburden myself to you. I'm just so upset. She unburdened herself to her mother.
References in classic literature ?
It's very seldom I talk as plainly as this to any, one but you are just the person one can unburden oneself to a little; and to tell you the truth, it's rather a relief.