This was in the Norwich Mercury in June 1826 and that £10 is quite a fine, that’s something like £700 in today’s money and it appears that he didn’t pay it. The prison at that point was the House of Correction which closed in 1837 and is now the site of the Norwich Catholic Cathedral. The House of Correction was at the same site as the City Gaol but it was a different institution, albeit run by similar management and these were originally intended for the punishment and reform of people convicted of lesser offences such as vagrancy, disorder, petty theft, drunkenness, breach of local regulations and similar misdemeanours.
There were too many William Pastons in Norwich at this time to be able to find out more about him, but I’m guessing that he took rum in for a friend or family members. And the result of that little arrangement was that he ended up imprisoned with them.