How common was it to heat your house with wood? I suppose that the main furnace used coal (preferably Blue Coal as advertised on The Shadow ), I also suspect that as an "extra", that is to warm up a particular room, wood may have been used, as in a fireplace. Now, being from Pennsylvania as I am, and knowing that that is where the coal came from until Wyoming was discovered, I distinctly remember neighbor houses that were heated with coal, they did not, as I recall, have fireplaces. But, period fiction (Peter Cheney anyone), especially Brit fiction, has fireplaces all over the place, especially in London. So what is the story? Were wood burning fireplaces all that common? Were they used as a main source, or a supplementary source of heat? Or were they, as they are now days, mainly an affectation?