What travel problem did Madhavrao and Dixit encounter at the train station, and how was it unexpectedly resolved?

According to Chapter 51, after Madhavrao and Dixit decided to travel to Shirdi, they faced a significant obstacle at the station. They had purchased second-class tickets for the ten o'clock night train, but when it arrived, they saw that the second-class compartment was packed to capacity. Gripped with worry and with little time left, they considered abandoning their plan and traveling the next day. Just then, the train guard suddenly appeared. He turned out to be an acquaintance of Dixit and resolved the situation by arranging for them to sit comfortably in the first-class compartment without any issue, allowing their journey to proceed as planned.