Most of us have formed an unrealistic picture of life on a desert island. We sometimes imagine a desrt island to be a short of paradise where the sun always shines. Life there is simple and good. Ripe fruit fall the tress and you never have to work. The other side of the picture is quite the opposite. Life on a desert island is wretched. You either starve to death or live like Robison Crusoe, waiting for a boat which never comes. Pergaps, there is an element of truth in both these pictures, but few of us have has the opportunity to find out.