Talbot joined the Blackbone Secret Society as a member of the Re-forged Alchemist Association, which must have been arranged by the Re-forged Association.
Noland Lee's judgment is based on evidence.
Take himself, for example.
After successfully escaping the Suffering Borderland, his [identity] column changed:
[Identity 1] Debtor (expired)
[Identity 2] Sin Soldier (expired)
As you can see, when someone truly leaves a certain power, the "expired" wording will appear in their [identity] column.
Talbot's Re-forged Association membership does not have this term, so he has not left the Re-forged Association.
From this, it can be concluded that the Re-forged Association secretly helped the Blackbone Secret Society build a machinery factory under the Savage Stone Wasteland.
Assuming that Blackwater Winery is a cover set up by Intelligence Department 6 and the Razor Gang is a local alchemy faction funded by Intelligence Department 6.