Charcoal portrait of an old man - Original, no reference.

I have been wanted to draw a portrait of an old man for a while now but haven´t had the chance to do it as I´ve always been drawing girls for any request or study, so finally I was able to do it as another form of study with the charcoal, I´m not used to use this material in my drawing so I´m kind of new with this technique and is really easy to let go of the hand and trust on what it´s doing.