Here's one I found in a do-it-yourself book from the 70's describing different formulas from the 19th century."Tobacco, to flavour - This is done by means a mixture of 1 part each of lemon peel, orange peel, figs, coriander seed and sassafrass. 1/2 part each of elder flowers, elder berries and cinnamon. 2 parts saltpeter, 3 parts salt, and 4 parts sugar. This mixture must be digested in 50 parts water and before applying it flavored with an alcoholic solution of gum benzoin, mastic and myrrh. This decoction gives a flavor to common leaves resembling Porto Rico but to this end the leaves must be well dried, about 1 year old and well permeated with the preperation. Keep in a pile for 8 days turning daily and finally dry."I don't know anything about this recipe but it is word for word from the book I have.