Relates that Mr. Jones Continued His Journey Contrary to the Advice of Partridge, With What Happened on that Occasion
They spot a light in the distance and start approaching.
As they get closer, they hear voices and strange music.
Now, the guide joins Partridge in saying that something weird is going on.
Tom thinks it's hilarious that they are both so afraid of people clearly having fun.
The light is coming from a large barn, where there are men and women gathered.
They invite Tom inside, since it's raining so hard.
It turns out that they are gypsies celebrating a wedding.
("Gypsy" is an old-fashioned name for the Roma people. In England, the Roma suffered a lot of discrimination: English legal codes were particularly harsh towards the Roma (though people did not enforce them often). So, for example, it was against the law for a Roma person to come into England from elsewhere and then stay for longer than a month.
A person convicted of breaking this law could be executed. In fact, Amnesty International reports that the Roma still face major discrimination in multiple European countries. For more information on the Roma people in Europe today, check out this or this.)
The center of all of this activity is the king of the gypsies.