Soak agar-agar as for Orange Jelly. Cook fruit with 1/2 pint water until well done. Strain through muslin. Warm the agar-agar until dissolved in 1 gill of water. Put the fruit juice, sugar, and agar-agar into a saucepan. If liquid measures less than 1 1/2 pints, add enough water to make up quantity. Bring to the boil, pour through a hot strainer into wet mould. Turn out when cold and serve.