On examination lumps of charred wood were found, interspersed with ashes, evidently the remains of some huge fire. Curiosity was soon excited, and further investigation demonstrated that in portions of these ugly-looking strata, the finger came upon small pieces of adipose matter, which yielded, like butter, to the touch. Iron rings were grubbed up; human bones, a cranium, a long tuft of hair, having belonged to some female. All these were more or less charred. Some of the iron was partially fused, and the texture of bone intermingled with sand was plainly discernible. _A gag turned up._ The question, what were these lugubrious records was answered at once. This field of the Cruz del Quemadero was the place where the "_Inquisition_" disposed of some of its victims. Here were the ghastly proofs of the horrors of which this place had been the scene, suddenly brought to light after the lapse of two centuries. On the 12th of May, 1689, eighty-three heretics, including twenty Hebrews, of whom five were women, were immolated on this very spot. The pile of wood was eighty feet in length by seven feet in height. A great concourse witnessed the _auto da fe_, and the horrible ceremonial completed, the people buried the remains of their victims under cart-loads of earth. These irregular geological strata are naught else but the silent testimony to the atrocities perpetrated on this in the name of religion and "Catholic Unity." Out of one, your special correspondent hooked out with his finger, one entire bone of a human vertebral column, a portion of the tibia, a fragment of a shoulder-blade with a hole through it, and a bit of a rib, all bearing the marks of fire. Upward of two cart-loads of remains of this sort have been carried away and decently buried. But these horrible strata! There they remain to tell their own tale, and instruct the present generation. On the 13th, a public meeting was convened, to be held at the Quemadero, by the Republican youth of Madrid, to protest against priestly intolerance and to advocate _freedom of conscience_. That this discovery should have been made at a moment when the Spanish clergy are striving their utmost to affirm the "unity of the Roman Catholic Church," and are preaching in the churches of the metropolis against heresy, is a striking coincidence.