Fill large stone jars with the fruit, which should be ripe, dry, and sound; set them into an oven from which the bread has been drawn several hours, and let them remain all night; or, if this cannot conveniently be done, place them in pans of water, and boil them gently until the plums are tender, and have yielded their juice to the utmost. Pour this from them, strain it through a jelly bag, weigh, and then boil it rapidly for twenty-five minutes. Have ready, broken small, three pounds of sugar for four of the juice, stir them together until it is dissolved, and then continue the boiling quickly for ten minutes longer, and be careful to remove all the scum. Pour the preserve into small moulds or pans, and turn it out when it is wanted for table: it will be very fine, both in colour and in flavour.