The stone work of Eureka Springs may be only 1/50th of that of the great pyramid, but the labor involved was immense. The weight of 60,000 cubic yards of limestone is approximately 132,000 tons. The stone was quarried near Beaver six miles away. It had to be transported in wagons or on railroad flat cars to the townsite. If brought by rail it was handled three or four times before it reached its destination. The mere lifting of the stone required at least three hundred million foot-pounds of work. If we knew how many foot-pounds a man can do in a day, we could figure the labor potential. The stone had to be cut and laid by skilled workmen. Most of this stone, laid seventy years ago, is in excellent condition today. Both limestone and sandstone are used for building material in northwest Arkansas, but the sandstone must be of the harder varieties to be useful for this purpose. Limestone is preferred, either of the Boone variety or marble. Marble limestone is found in Carroll County, but it is not as plentiful as other grades. The block of marble sent from Arkansas to be placed in the national Washington monument, was quarried near the corner of Carroll and Newton counties. Onyx marble is found in this section and at one time Eureka Springs had an onyx factory which used the stone in manufacturing jewelry. Great slabs of it were taken from the caves in the vicinity. It is a stone of many colors—white, cream, dull red, and yellowish brown, with the colors usually in alternate stripes. It takes a brilliant polish. The agate, found in our hills, is a crystal formation, but the particles are so minute that they are discernable only under the microscope. It is shaped by the cavity in which it is formed. The colors depend upon the mineral matter it contains; iron producing reds, saponite the greens, chalcedony the grays, and caladonite the blues. The agate is classed as a gem but it is also used in the manufacture of bowls, vases, signet rings, and for rollers in the textile industry. William Cullen Bryant in his poem “Thanatopsis” spoke of the earth as “rock ribbed and ancient as the sun.” Perhaps he was wrong in his conjecture that the earth is as old as the sun, but we leave that to the astronomers. It is true that the rock-ribbed earth is very old and each of the “ribs” gives testimony of antiquity. One of the interesting fossilized remnants found in our Ozark country is the crinoid, commonly referred to as a sea lily stem.