Between the river and Turnwise Broad Way below The Maul, Unseen University is separated from the city rimward by The Backs. This street is defined by the backs of several of the university buildings, which would account for the name. The Backs is connected to Turnwise Broad Way by the interestingly named Eight Deadly Sins.
The street can suffer (or even benefit) from magical leakage from the university. Urban dogs, cats and rats which frequent the trash bins and piles behind UU have developed uncanny intelligence and abilities, including human speech. The Music chose the street to set up a shop to bring the guitar to Imp y Celyn.