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"     My Rookwood vase (15&amp;quot;H) is stamped A.R. VALENTIEN on the bottom with a Roman numeral I. What is the history? S.A., WHITE PLAINS, N.Y. The Rookwood Pottery of Cincinnati, Ohio, was founded in 1880 and became the premier maker of American art pottery. Beginning in 1886, Rookwood used an impressed RP mark on the bottom. Every year a flame was added beside this monogram, until 1900 when there were 14 flames. A Roman numeral was then used. Iris may be the glaze name, first used in 1896. Albert Robert Valentien worked at the factory during that time.   valued at: $8,500  *The estimates provided are preliminary only and subject to change based onfirsthand inspection and further research. Appraisal prices refer to anitem&amp;#039;s fair market value, or what one might expect to pay for an object ofsimilar age, size, color and condition at auction. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.countryliving.com/shopping/antiques/a617/rockwood-vase-appraisals-0705/>