Shadows from trees on the wall of an old canal-side mill

I took this photo of Denholme Mill in April this year. It was late afternoon so the sun was low, casting strong shadows from the trees on the other side of the canal onto the mill wall. I love the shapes and colours of our old mills anyway, but these shadows make this one even more intriguing.

The upper floors of this mill (at road level) are now home to a camping shop (Springfield Camping at Luddenden Foot) - the lower floors at canal level don't look to be used any more (from the outside at least). I haven't been able to find anything about the history of the mill.

Camera/lens settings: ISO 100, f/5, 1/250s, 28mm, hand held.