On January 3rd, Marvin and Yuniya, who had continuously activated the Heart of the Jungle for long-distance teleportation, returned to London.
The speed of the steam airship was still too slow; though it could reach London in three days, it was unable to arrive quickly in case of an emergency. In contrast, the Heart of the Jungle was extremely useful; without concern for magic power consumption, one could return from Moscow to London in at most half a day.
This is worth researching more... Conveniently, Luca is also here; They should know more about this...
As Marvin was thinking, he arrived at St. Paul's Cathedral and met Kovalev, who was passing on the information. Now, the Church of Truth had its own church in London, led by Bishop Augustus, one of the first batch of students Marvin had taught two years ago.