One of the fields we include in our records for publishing, printing, and bookselling businesses in the WPHP—our firm records—is for the addresses where they operated. Sometimes this is straightforward: one individual working at one location for the duration of their career. Other times, however, it is decidedly less so. There are booksellers running multiple shops at the same time, printers moving locations every year or two for fifteen years, publishers working with various combinations of ...