Calculus

That scent, I knew, a distillation of a hundred flowers, nurtured like a priceless wine, was a secret guarded by the perfumers of Ar. It contained as well the separated oil of the Thentis needle tree; an extract from the glands of the Cartius river urt; and a preparation formed from a disease calculus scraped from the intestines of the rare Hunjer Long Whale, the result of the inadequate digestion of cuttlefish. Fortunately, too, this calculus is sometimes found free in the sea, expelled with feces. It took more than a year to distill, age, blend and bond the ingredients.

Marauders of Gor     Book 9     Page 114