It's not a true story. 'Old Henry' is the product of the imagination of the writers and filmmakers. They crafted the plot and characters to tell an engaging fictional tale.
Old Henry claimed to be a true story. It drew from actual happenings but might have incorporated artistic liberties to make it more engaging and cinematic.
It's possible that there is a 'Old Henry True Story' that is famous in a niche area, such as a historical society focused on a certain region. If Old Henry had some significant role in that region's history, like being part of a significant battle or discovery, then the story could be famous among those interested in that specific historical context.
The 'old henry story' could be a variety of things. It might be a fictional tale where Old Henry is a bit of a mystery. He could live in an old, creaky house at the edge of town. The story could revolve around the strange things that happen around his place, like strange noises at night. Or perhaps it's a heart - warming story about how Old Henry, despite being old, still has a lot of love to give, especially to his pets if he has any, like an old hen that has been with him for years.
Well, the age of Henry in the marriage story isn't explicitly stated at first glance. Maybe it's mentioned later on or hinted at through certain events or dialogues.