Jane Grenville, in her scholarly and definitive work Medieval Housing, provides an arresting pair of illustrations showing how two archaeological teams, using the same information, envisioned the appearance of a longhouse at Wharram Percy, a lost medieval village in Yorkshire. One illustration shows a strikingly plain, basic dwelling, with walls made of mud or clunch (a composite of mud and dung) and a roof of grass or sod. The other shows a much sturdier and more sophisticated cruck-framed construction in which hefty beams have been fitted together with skill and care. The simple fact is that
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