Harriet Elizabeth Wilcox worked at Rookwood Pottery for many years, yet very little is known about "Hattie" at this time. She decorated from 1886 until the 1930's, with a hiatus for a few years after 1907. Her work is found on a variety of glazes due to her long tenure. She was one of only a handful of artists to decorate in the black opal glaze. Collector interest in her pieces is considered to be average.