From the Hans Christian Andersen biography "The Life of Hans Christian Andersen. Day By Day", written by DPhil Johan de Mylius:
Differences with Professor Guldberg are settled.
Once again in Copenhagen, where he stays with Jonathan Balling, the warehouse administrator. On the last day of the holiday, a Saturday, HCA wishes to go to the theatre, and must therefore walk, on the next morning, 5th January, all the way to Slagelse, where he arrives at one am in the night.