Soak the gelatine for two hours in half a cupful of the water. Mash the strawberries and add half the sugar to them. Boil the remainder of the sugar and the water gently twenty minutes. Rub the strawberries through a sieve. Add the gelatine to the boiling syrup and take from the fire immediately; then add the strawberries. Place in a pan of ice-water and beat five minutes. Add the whites of eggs and beat until the mixture begins to thicken. Pour in the molds and set away to harden. Serve with sugar and cream. Raspberry and blackberry sponges are made in the same way.