Gas lighting was first introduced to the Judge's Lodging in 1860, powered by the newly established gas works in Hereford Street. It was, however, fitted only in the basement where the servants lived and worked - it was reported that 'they should see how the thing worked first before incurring further expense', ie. they were testing it out on the servants! It was eventually fitted in the courtroom, but was apparently considered too down market for the judge's apartments, leaving the judges to struggle down stairs by candlelight to the one toilet!

Source: The Judge's Lodging Museum