A good day's haul from Portsmouth, OH. Most of these are from the ruins of the Star Fire Brick Co. on the bank of the Ohio River. All have been cleaned since they were covered with either dirt or mortar. Soaking in muriatic acid for a day or two does the trick. PPB = Portsmouth Paving Brick, UPS = Union Paver Sciotoville (formerly a separate city, now a suburb of Portsmouth).