So I thought it might be interesting, for the length of a book, to consider the ordinary things in life, to notice them for once and treat them as if they were important, too. Looking around my house, I was startled and somewhat appalled to realize how little I knew about the domestic world around me. Sitting at the kitchen table one afternoon, playing idly with the salt and pepper shakers, it occurred to me that I had absolutely no idea why, out of all the spices in the world, we have such an abiding attachment to those two. Why not pepper and cardamom, say, or salt and cinnamon? And why do forks have four tines and not three or five? There must be reasons for these things. Dressing, I wondered why all my suit jackets have a row of pointless buttons on every sleeve. I heard a reference on the radio to someone paying for room and board, and realized that when people talk about room and board, I have no idea what the board is that they are talking about. Suddenly the house seemed a place of mystery to me.