Fill your crucible three parts full of soft water, and put it on a slow fire, at the same time put in your blue ingredients, previously prepared, (this is done by dissolving the powdered blue in oil of vitriol and water in a stopper bottle for twenty-four hours). If there is a very light shade of blue required, put in a couple of table-spoonfuls of the blue ingredient, and add to it as the shade may be varied at will according to the quantity of the stuff; boil the hackles in tartar and alum, say a table-spoonful of each, or rather less of the tartar, simmer it on the fire for two or three hours according to the process mentioned before; and when the proper colour is produced take out the hackles, hair, or fur, and wash them well in soap and hot water.

There is a paste blue prepared at the dry-salters all ready for the dye pot, take a table-spoonful of it and stir it well up in your pot nearly full of soft water, and boil it gently for about an hour (or less), then put in your hackles or hair, previously washed and wet going in, boil for two hours very slowly and wash off the dye; any shade of blue may be had in a very short time by this process; there are two or three dry-salters in Long Acre where this paste blue is sold, and any of the other ingredients may be purchased at their shops, or at chymists.