300 years ago, St James's Market was a bustling marketplace. But up until 6 months ago, it was mostly a taxi rat-run. We created an open-air exhibition for what is now a newly revitalised public square. The brief was simple: fit 300 years of history under one roof. In the depths of a research rabbit hole, we discovered an 18th century ballad set in St James's Market and went on to retell the tale across more than 100 vignettes illustrated by James Graham and narrated by Stephen Fry.