Strip all the skin and fat off a leg of veal; then cut all the fleshy parts from the bone, and add a shin of beef, which treat in the same way; boil it slowly in three gallons of water or more according to the quantity of the meat; let the pot be closely covered: when you find it, in a spoon, very strong and clammy, like a rich jelly, take it off and strain it through a hair sieve into an earthen pan. After it is thoroughly cold, take off any fat that may remain, and divide your jelly clear of the bottom into small flatfish cakes in chinaware cups covered. Then place these cups in a large deep stewpan of boiling water over a stove fire, where let it boil gently till the jelly becomes a perfect glue; but take care the water does not get into the cups, for that will spoil it all. These cups of glue must be taken out, and, when cold, turn out the glue into a piece of new coarse flannel, and in about six hours turn it upon more fresh flannel, and keep doing this till it is perfectly dry; if you then lay it by in a dry warm place, it will presently become like a dry piece of glue. When you use it in travelling, take a piece the size of a large walnut, seasoning it with fresh herbs, and if you can have an old fowl, or a very little bit of fresh meat, it will be excellent.