From MC's Perspective:
Right after, a few people checked the monster carriage. Not only they opened the cabin. But casted a magic spell to see any hidden items and magic scrolls.
Any simple magic spell stored scroll can cause damage to the airship. That's why every airship vehicle undergoes thorough checking.
After seeing that everything was fine, they left. Then the butler came back again and drove the carriage to the basement.
10 minutes later,
The Butler left but I remained inside the Gregor Mansion. I still feel it's not safe to go outside. Who knows how many rich young wizards there are? There must be a protector behind them to guard.
After gaining some clarity, I have decided to wait a little bit longer.
Time passed,
All the important passengers have boarded the airship. Which includes young, middle aged and old people. But all of the passengers are influential people.