This was originally published as a series of newspaper articles by Mr. Leckey before being consolidated as a book in 1950 and then reprinted with an every-name index under the auspices of the Greene County Historical Society in 1977. The work commences with an historical overview of settlement in the Tenmile Country, and it concludes with the aforementioned index of some 30,000 entries. In between, the genealogist of southwestern Pennsylvania can savor 500 or more family histories, of varying lengths, which delineate the lineages of the many families who migrated into this area. The genealogies, which are arranged according to place of settlement, are periodically embellished with rosters of one sort or another, maps, facsimiles, and illustrations. Overall, the genealogical sketches cover or touch on more than 2,000 main families who settled in the Upper Monongahela during the final third of the eighteenth or first quarter of the nineteenth century. Without a doubt this is the starting point for genealogical research in southwestern Pennsylvania, and Clearfield Company is delighted to make it available again.