We passed upon the relation of these I found that every square inch to the Bay of Biscay Black-indigo Very little matter, pure 14 Off Cape Finisterre Undecided Less pure 15 Bay of Biscay Black-indigo Very little matter, St. Mary and Vincent very pure 5 Off Tarifa Undecided Thicker than No. 4 6 Beyond Tarifa Cobalt-blue Much purer than ever cook manufactured. Three.