Walter M. Gibbs, Spices and How to Know Them
“ Long pepper is a spice often called for during the fall season for pickling. It imparts a flavor to pickles which causes a demand for it for preserving purposes. There is much old stock on the market, which is poor. This is often used to adulterate ordinary pepper, but it can be readily detected by its disagreeable odor, which warmth will develop, and by its slaty color and the amount of sand it contains. Although grinders try to destroy the odor by bleaching, and the slaty color by sifting out the husk to make it lighter, its characteristics cannot be covered up in the true pepper. ”
