One of her selling agents, Sarah Breedlove Davis, later known as Madam C. J. Walker, operated first in St. Louis and later in Denver, Colorado until a disagreement led Walker to leave the company. Walker took the original Poro formula and created her own brand of it. This development was one of the reasons which led then Turnbo to copyright her products under the name "Poro" because of what she called fraudulent imitations and to discourage counterfeit versions. "Poro" may have received this name from a Mende word for "devotional society" or it may be a combination of the married names of Annie Pope and her sister Laura Roberts. Due to the growth in her business, in 1910 Turnbo moved to a larger facility on 3100 Pine Street.