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490
THE BOOK OF THE PEARL
According to Squier and Davis/ two quarts of pearls were ori­ginally deposited in one of these mounds. The writers consider that the pearls were probably derived from the fisheries in the southern waters, and they regard their presence in the Ohio mounds as a proof of "an extensive communication with southern and tropical regions and a migration from that direction."
A number of pearls or pearl beads from the Ohio mounds and which formerly belonged to the Squier and Davis collection, are now in the Blackmore Museum at Salisbury, England. According to a com­munication from Dr. H. P. Blackmore, director of the museum, these pearls, which originally formed five necklaces, have been much injured by the action of fire at the time the bodies of those interred in the mounds were burned. Mr. Blackmore considers that the greater part of the pearl beads are of mother-of-pearl cut from some large shell, made into a round shape and perforated, but, after very careful ex­amination, he is of the opinion that about ten may be classed as natural pearls. Their present color is a dull, leaden gray, rather lighter than the "black pearl" of commerce. The size of these pearls or beads varies from four millimeters to twenty millimeters in diameter. One of the necklaces consists of thirty-three beads well graduated, but of a dead white color from the action of the earth.
A quarter of a century later, when the Centennial Exposition was in preparation, the Smithsonian Institution undertook the formation of a public exhibit illustrating American archaeology, and engaged Prof. F. W. Putnam, of Cambridge, Massachusetts, to open and examine some of the most remarkable of the mounds described by Squier and Davis. These explorations were continued for some years, partly for the government and partly for the Peabody Museum of Archaeology at Cambridge, and their results were exhibited at the Columbian Exposi­tion in 1893. The mounds explored were chiefly in the valley of the Little Miami, and particularly those known as the Turner group.
A very important series of explorations was also carried on by Mr. Warren K. Moorehead, covering the years from 1887 to 1893, largely in preparation for the Columbian Exposition. These investigations were mainly in the Scioto valley, in the counties of Ross, Franklin, and Pickaway, Ohio. Among the most important results then obtained were those from the mounds of the "Porter" and "Hopewell" groups, in Ross County.
Since that time, much valuable work has been done by Mr. Moore­head and others, and particularly under the auspices of the Ohio State Archaeological and Historical Society. The latest and most complete investigation was made for this society in 1903, by its curator, Prof.
1 Squier and Davis, Smithsonian "Contributions to Knowledge," Vol. I, 1848, p. 283.