Make a brine of salt and water, in the proportion of a quarter of a pound of salt to a quart of water; put the walnuts into this to soak for a week; or if you wish to soften them so that they may be soon ready for eating, run a larding pin through them in half a dozen places - this will allow the pickle to penetrate, and they will be much softer, and of better flavor, and ready much sooner than if not perforated: put them into a stewpan with such brine, and give them a gentle simmer; put them on a sieve to drain; then lay them on a fish plate, and let them stand in the air till they turn black - this may take a couple of days; put them into glass, or unglazed stone jats; fill these about three parts with the walnuts, and fill them up with the following pickle.
To each quart of the strongest vinegar put two ounces of black pepper, one of ginger, same of eschalots, same of salt, half an ounce of allspice, and half a drachm of cayenne. Put these into a stone jar; cover it with a bladder, wetted with pickle, tie over that some leather, and set the jar on a trivet by the side of the fire for three days, shaking it up three times a day, and then pour it while hot to the walnuts, and cover them down with bladder wetted with the pickle, leather, etc.
Gather them for pickling when the head of a pin will pierce them easily; run a large needle through them here and there, or score them on one side with a knife; lay them into a brine of salt-and-water for twelve days, changing the brine twice in that time; strain, and put them into a jar, and sprinkle & little salt over them. Boil four quarts of vinegar for a hundred walnuts, allowing to each quart one ounce of whole pepper, and one of ginger, half an ounce each of sliced nutmeg and whole allspice, a table-spoonful of mustard seed, and one of scraped horseradish, one head of garlic, or a small onion; pour it boiling hot over the nuts, and put a plate on the jar; when cold, tie it closely down. After the nuts are used, the liquor may be boiled, strained, and bottled, to use as a pickle.