Hill Fort Thingy

Above is Jims Hillfort thingy which he has been working on, as far as I know he was kidnapped by his other half and has gone to that land which we all fear, holidays.... So Im posting for him, this is what he said about his piece:

Some progress on my nearly completed hill-fort illustration for an archaeology toolkit. The first version was with body colour and it really made me miss the look of my older illustrations, so I started again without using white.