GAD'S HALL When a house comes up for sale at a ridiculously low price there has to be a catch. Doesn't there? Some sort of legal problem. More prosaically, rising damp or subsidence. But Gad's Hall had none of these problems; it was modernised and in good condition. Mr. Thorley, the vendor, had his reasons for the sale and the price so Jill and Bob Spender were happy to make the purchase. What Mr. Thorley did not--could not--know...