Get small green musk-melons or cantelopes. Cut a small square from the side of each one, and, with a teaspoon, scrape out all the seeds. Make a brine of one pint of salt to a gallon of water. Cover the mangoes with it while it boils. Let them stand two days; then drain them, and stuff with the same mixture as is used for peppers. Pour boiling vinegar over them, using in it a bit of alum.