 He left most of the brewery to his grandsons, with the rest going to his head clerk James Grant, who took over the running of the brewery.After Grant's death in 1788, his share was purchased by Sampson Hanbury, who went on to run Truman's for the next 46 years.Hanbury was one of the most important figures in Truman's history, responsible for bringing in new levels of professionalism and efficiency.