of second quality is of a mottled appearance within; while of worse quality is that which is of a black colour within; the very worst of all is that which is black on the outside as well. The price of myrrh varies according to the number of purchasers. Stacte is sold at prices which vary from three denarii to forty per pound, while the very highest price of the cultivated myrrh is eleven denarii. Erythræan myrrh, the same, it is pretended, as Arabian myrrh, is sixteen denarii per pound, Troglodytic also, is sixteen denarii; and that known as odoraria, or odoriferous myrrh, sells at fourteen. Myrrh is adulterated with pieces of mastich, and other gums; it is also drugged with the juice of wild cucumber, in order to produce a certain bitterness, and with litharge for the purpose of increasing its weight. Other sophistications may be discovered on tasting it, and the gum will adhere to the teeth. But the cleverest mode of adulterating it is with Indian myrrh,[535] a substance which is gathered from a certain prickly shrub which grows there. This is the only thing that India produces of worse quality than the corresponding produce of other countries: they may, however, be very easily distinguished, that of India being so very much inferior. CHAP. 36. (17.)—MASTICH. The transition, therefore,[536] is very easy to mastich, which grows upon another prickly shrub of India and Arabia, known by the name of laina. Of mastich as well there are two different kinds; for in Asia and Greece there is also found a herb which puts forth leaves from the root, and bears a thistly head, resembling an apple, and full of seeds. Upon an incision being made in the upper part of this plant drops distil from it, which can hardly be distinguished from the genuine mastich. There is, again, a third sort,[537] found in Pontus, but more like bitumen than anything else. The most esteemed, however, of all these, is the white mastich of Chios, the price of which is twenty denarii per pound, while the black mastich sells at twelve. It is said that the mastich of Chios exudes from the lentisk in the form of a sort of gum: like frankincense, it is adulterated with resin. CHAP. 37.—LADANUM AND STOBOLON.