Before the fire that destroyed a great part of the city of Jacksonville, Fla., had ceased to burn, the city has practically been rebuilt. This statement not only describes a building operation remarkable for rapid execution, but also covers an incident unique in the experience of firemen. Jacksonville was almost wiped out by fire on May 3 of last year. An area of 443 acres, comprising 148 blocks, was swept by the flames, and property worth at least $15,000,000 was destroyed. The work of rebuilding on a better and more substantial scale was started within a week and has since gone on with rapidity unprecedented in Southern building operations, and now the city is in far better shape than it was before the fire. About three weeks ago the clearing up of the last of the ruins was begun. The laborers doing the work removed three or four inches of the mass of brick and stones on top, and then found, to their surprise, that underneath the ruins were still hot. Smoke began to rise out of the hole they had dug out, and the farther down they went the hotter became the ruins, and the thicker the smoke. At last a mass of red hot coals was found, which sprang into flame when the air reached it. It had been necessary several times within the year for the fire department to soak this part of the ruins with water, but it had been thought for several months that the fire must be out at last. Alongside new Jacksonville had already sprung into existence. Six months after the destruction of the city a new one already covered the greater part of the site. Within eleven months more than 2,000 buildings were erected, fifty of them aggregating in cost $2,000,000. And the new Jacksonville is immeasurably superior to the old. A PRAIRIE CAVERN. AN INTERESTING HOLE IN THE GROUND WHERE CAVES WOULD NOT BE LOOKED FOR. _From the Oklahoma State Capital._ SULPHUR SPRINGS, I. T., Oct. 18.--At a spot eleven miles southeast of this place, in the level prairie upland, is an opening about forty feet in diameter and sixty feet in depth. By clinging to its rocky and precipitous walls, a person may descend to the bottom, and there find the openings to the two caves, one leading westward, and the other two to the east. For years this place has been known as Rock Prairie Cave. It is one of the most striking natural curiosities in the Chickasaw nation. The caves are of unknown length, and through one rushes a subterranean stream of great depth in places and of icy coldness. Exploring parties have ventured into these labyrinths for hundreds of yards, but the danger of becoming lost has prevented a thorough examination of the underground passages.