Slothrop's Nativity & Religous upbringing...

[jbor]

The passage where Geli and Slothrop stand atop the Brocken and throw their
shadows across the countryside (329-330) throws up a few more details about
"Slothrop's family tree" and confirms the link between Tyrone and Pynchon.
It also connects back to the setting of 'The Secret Integration' ("Snodd's
Mountain" -- there are clues later, too, in 'The Occupation of Mingeborough'
fragment at 744), which Pynchon describes as follows in the 'Introduction'
to Slow Learner:

   " ... this is a hometown story, one of the few times I tried to write
   directly out of the landscape and experiences I grew up with ... "
                                                         (SL 20-21)

This might not be relevant to your project, however.

best