 The lone surviving Pipe roll from Henry I's reign, that of 1130, has been a popular subject of study. Recent investigations include Judith Green's search for evidence of Henry's financial system. Another historian, Stephanie Mooers Christelow, has studied the roll along with those from the reign of Henry II, looking for the exemptions and grants made by both kings to various royal favourites. Christelow has also studied the 1130 roll to see what light it can shine on Henry I's judicial system, as well as on the growth of royal courts during Henry's reign. The historian C. Warren Hollister used the 1130 Pipe roll to study the rewards of royal service during Henry's reign.
