Walter M. Gibbs, Spices and How to Know Them
“ Black pepper is much more liable to be adulterated than the white, although it is perfectly easy to dilute the latter with broken rice or cracker dust, or with long pepper. There is a disposition many times on the part of those who can afford it to have the best that can be made, in appearance at least, and it is thought by some that the whiter the color of the pepper the purer the quality. ”
