Woolsthorpe Manor was a very simple house, shaped like a fat T with its crossbar fronting on the lane, made of the soft pale stone that was used for everything around here – its roof a solid mass of lichens. It was built sideways to a long slope that rose as it went northwards, and so, on its southern end, the land fell away from it, giving it a clear sunny exposure. But this opportunity had been wasted by the builders, who had put almost no windows there – just a couple of them, scarcely larger than gun-slits, and one tiny portal up in the attic that made no sense to Daniel at first. As Daniel noted while his horse toiled up the hill through the grasping spring mud, Isaac had already taken advantage of this south-facing wall by carving diverse sundials into it. Sprawling away from there, down the hill and away from the lane, were long stables and barns that marked the place as an active farmstead, and that Daniel didn't have to concern himself with.