If you find that after they have been kept awhile, the syrup inclines to become dry or candied, give it another boil with the crab apples in it, adding a tea-cup full of water to about three or four pounds of the sweetmeat.
Take large fine green gages that are not perfectly ripe. Weigh them, and to each pound of fruit allow a pound and a half of loaf-sugar. Put a layer of fresh vine leaves at the bottom of a porcelain preserving kettle, place on it a layer of gages, then cover them with a layer of vine leaves, and so on alternately, finishing with a layer of leaves at the top. Fill up the kettle with hard water, and set it over a slow fire. When the gages rise to the top, take them out and peel them, putting them on a sieve as you do so. Then replace them in the kettle with fresh vine leaves and water; cover them very closely, so that no steam can escape, and hang them up at some distance above the fire to green slowly for six hours. They should be warm all the time, but must not boil. When they are a fine green, take them carefully out, spread them on a hair sieve to drain, and make a syrup of the sugar, allowing a half pint of water to each pound and a half of sugar. When it has boiled and been skimmed, put in the green gages and boil them gently for a quarter of an hour. Then take them out and spread them to cool. Next day boil them in the same syrup for another quarter of an hour. When cold, put them into glass jars with the syrup, and tie them up with brandy paper.
To preserve them whole without peeling, you must prick each at the top and bottom, with a large needle.
Take fine ripe plums; weigh them, and to each pound allow a pound and a half of loaf-sugar. Put them into a pan, and scald them in boiling water to make the skins come off easily. Peel them, and throw them as you do so into a large china pitcher. Let them set for an hour or two, and then take them out, saving all the juice that has exuded from them while in the pitcher. Spread the plums out on large dishes, and cover them with half the sugar you have allotted to them, (it must be previously powdered,) and let them lie in it all night. Next morning pour the juice out of the pitcher into a porcelain preserving kettle, add the last half of the sugar to it, and let it melt over the fire. When it has boiled skim it, and then put in the plums. Boil them over a moderate fire, for about half an hour. Then take them out one by one with a spoon, and spread them on large dishes to cool. If the syrup is not sufficiently thick and clear, boil and skim it a little longer till it is. Put the plums into glass jars and pour the syrup warm over them.
The flavour will be much improved by boiling in the syrup with the fruit a handful or more of the kernels of plums, blanched in scalding water and broken in half. Take the kernels out of the syrup before you pour it into the jars.
You may preserve plums whole, without peeling, by pricking them deeply at each end with a large needle.
Green gages and damsons maybe preserved according to this receipt.