The main part of this two and a half story house was built circa 1820. There is no insulation in the walls at all. (Attic has been insulated.) Walls consist of cedar clapboards, full one each boarding boards, cavity, wooden lathing, 1 to 1.5 inches of plaster. The real problem comes with the wall construction. There are 8 by 8 inch corner posts, and 4 by 4 inch framing around the windows - that's it; no other wall studs. Because of this construction, the area from corner post to window framing is anywhere from 3 to 4 feet plus. I have consulted with two insulation contractors and one carpenter who has 30 years' experience with old houses. The consensus is that blowing in insulation from the outside would be useless as it would settle even more under my conditions than it does anyway. This is not a drafty house; I do, however, use 8+ cords of wood per winter and would like to reduce this amount as well as the wear and tear on my aging body. Tearing out the plaster walls and insulating from the inside is not an option. I'm afraid I already know the answer, but would be interested in any options for insulating from the outside I may not have thought of. Thanks.