AtD translation: invested in, invested by

[Mike Jing]

P452.6-12   The conferees had gathered here from all around the world,
Russian nihilists with peculiar notions about the laws of history and
reversible processes, Indian swamis concerned with the effect of time
travel on the laws of Karma, Sicilians with equal apprehensions for the
principle of vendetta, American tinkers like Merle with specific
electromechanical questions to clear up. Their spirits all one way or
another invested in, invested by, the siegecraft of Time and its mysteries.

In what senses are the two "invested" used, especially the second?