Have you ever wondered, “Where does all the WPHP data come from?” Well, look no further than this month’s episode of The WPHP Monthly Mercury! From missing Frances Burney and Ann Radcliffe editions to ESTC imprint-specific searches, our sixth episode identifies data gaps and explores our superstar resources, the wide variety of print and digital sources we use, and the data limitations we wrangle on a daily basis while working on the WPHP.