Houses that are not very new are always more or less tumble-down. The mud ceilings crack very easily, and the white gypsum flakes off at the slightest touch. The more essential parts of the structure are equally undurable. But you must remember that no Yezdi wants his house to last for ever. When the house is first of all built, a large chamber is made below the surface to receive the drainage, and the size of this is determined by the length of time the owner wishes his house to last, which is generally forty to fifty years. When the chamber is full, the rich occupants move to another house, and the house gradually falls to pieces. To the Yezdi an old house means a bad house, and this idea is so deeply rooted, that even in his _bagh_ he seems to prefer young trees to those which have attained their full size. The idea of a residence which bears the marks of natural growth, and is not simply artificial, has never entered into the Yezdi’s mind; and the absence of this to us familiar idea, has to be reckoned with in dealing with his character. Also it must be remembered that two-thirds of a Persian town, and three-quarters of a Persian village, is from various causes invariably in ruins. I suppose that in an English climate the best-built Yezd dwelling houses would remain standing for about a fortnight. In spite of their palatial design they are really nothing but mud huts, and when you live in them, or rather about them, for you are in the open air as often as you are inside, you learn their imperfections to your cost. Nobody can realise the immense amount of damage that can be done in a town like Yezd by a really wet day. Some while ago we had twenty-four hours of rain, which destroyed, I believe, about a couple of hundred roofs, and, what is worse, caused the older _qan’at_ pits to fall in, blocking the water supply in some parts of the town for three months. Is there any other town in the world where a little extra rain causes a three months’ drought? There is a story in Tehran about a Dutch Ambassador, who was so afraid of the roof falling down that in wet weather he invariably slept under the table. However he was a very tall man, and, when the catastrophe happened, he got his foot crushed.