 At the request of Sydney Williams, brother-in-law of Baker and managing director of the chocolate mill, Pierce returned to Boston after a year and was appointed manager of the Walter Baker Counting House at 32 South Market Street in Boston (now a part of the Quincy Market retail area).After the deaths of both Walter Baker (in 1852) and Sydney Williams (in 1854), Pierce was permitted to lease the chocolate business from the trustees of the Baker Estate.The trustees of the Baker Estate, aware that Pierce had only been with the company for five years, leased the business to him for a two-year probationary period, "subject to a life interest payable annually to Mrs. Baker," widow of the owner and step-aunt to Pierce, until her death in 1891.