Dip Pen and Ink Wash - Tree Roots

It's been ages - I'm doing so much more sketchbook work nowadays (I might upload some of it later). But here's two drawings I've done of trees: they took me ages, but I'm really pleased with them! This first one is of a tree I saw walking in the woods - the roots are all coming out of the ground, as it's on a slope that a lot of people walk down. I thought that the way they dipped up and down out of the ground was really interesting, and I hope you can see that that's what's going on here! I thought I'd try a different kind of shading for this picture - lots of regular lines attempting to describe the forms. I was thinking of kinds of renaissance engraving techniques!
This picture has lots of interesting little details that you'll have to zoom to see, like the clumps of moss round the stump on the right, and the leaves floating in a little pool of water at the bottom of the trunk. By the way, I thought that because I was going for an 'engraving' look, the most I could do besides covering the ground in hatching was to colour it grey. I'm very happy with this picture myself.