E. E. Kellogg, Science in the Kitchen
“ In appearance and size the fruit is much like the plum; when ripe, it is very dark green, almost black, and possesses a strong, and, to many people, disagreeable flavor. The pulp abounds in a bland oil, for the production of which it is extensively cultivated in Syria, Egypt, Italy, Spain, and Southern France. The fruit itself is also pickled and preserved in various ways, but, like all other similar commodities when thus prepared, it is by no means a wholesome article of food. ”
