Seven years ago Julia Knowles decided to set up a home for severely handicapped young people. So she set about raising the necessary quarter-of-a-million pounds and 18 months ago she succeeded. Martha House in Deal is now a loving home for eight young people, all of them severely handicapped, mentally and physically, all of them needing the constant care and attention of the 25 full-time staff. But Martha House still needs nearly £1,000 a week from charitable donations to keep it going. As a nation we are giving more and more to charity, but as demands on our generosity increase, how many more causes can we sustain? And what happens to the young people in Martha House if the giving stops?