After the resources in northern New Jersey were depleted and the excitement had died out, little was heard of pearling in this country until 1878, when many were found in Little Miami River in southwestern Ohio. The fishing was carried on at low water, and principally by boys, who would wade out in the water and feel for the mollusks with their feet, and then bob under and pick them up with their hands. The senior author spent a day in this fishery with a party of six boys with some success. During 1878 about $25,000 worth of pearls were collected in the vicinity of Waynesville on that stream. Mr. Israel H. Harris, a banker of Waynesville, then began collecting these pearls; and by purchasing during several years nearly every interesting specimen found in the vicinity, he made his collection one of the largest and best known in the country. When sold in 1888, it contained several thousand pearls, mostly of small size, averaging in weight little more than one grain each. A large portion of this collection was exhibited in the American section of the Paris Exposition of 1889, and was awarded a gold medal. Included in this exhibit was a series of ornaments in which the gems were arranged according to color, so that in one the pearls were green, in another purplish brown, in another pink, in another waxy white, and in one a cream-white. It also contained a button-shaped pearl weighing thirty-eight grains and several pink ones almost translucent. A pink pearl of eight grains was admired by all who saw it; by reflected light this had the color and translucency of a drop of molten silver. Many of the pink pearls found in the Little Miami and its tributaries were of the most beautiful rose-petal pink; pearls of this peculiar color have never been found in any other waters. From Ohio the industry gradually extended westward and southward, and new fields were developed, pearls to the value of about $10,000 annually coming on the market from such widely separated States as Vermont, Kentucky, Tennessee, Florida, Texas, Washington, etc. However, little general interest was taken in fresh-water pearls, and few choice ones were found until the magnificent resources of the upper Mississippi Valley were discovered. Owing to the ease with which the mollusks may be collected by wading, it was in the relatively shallow tributaries that the fishery first developed, rather than in the deep channels of the main stream and of the large affluents.