Choose greengages which are not too ripe; prick them in several places with a large knitting-needle.
For 2 lb.
of greengages, make a syrup with 1 lb.
of sugar and enough water for this syrup to cover the fruit.
Plunge the fruit into the syrup, turning them over all the time until the knitting needle will go through them easily.
Tip it all into a large earthenware bowl, and leave the greengages for 2 days to soak up the syrup.
Drain the greengages.
Boil up the syrup to thicken it, then pour it again over the fruit.
Leave for 10 to 12 hours.
Repeat this procedure several times, until the sugar entirely coats the greengages.