Lovely atmospheric (in some cases literally - you can see it!) images as usual David.
Not generally a fan of matt papers as I have never been happy with the contrast loss for landscapes, but I have not seen Art 300 in-the-flesh so it's difficult for me to visualize the actual prints but I'm sure your selection of negatives and printing takes advantage of what the paper has to offer.
I can feel a trip to Dartmoor coming on...