Original Receipt from 'Modern Domesic Cookery' by Elizabeth Hammond (Hammond 1819)Gloucester jelly.
Take two ounces each of hartshorn shavings, eringo root, pearl-barley, rice, and sago, simmer them with three quarts of water till reduced to one; then strain it off, when cold it will be a jelly; it may then be dissolved in wine, milk, or broth, as occasion may require.