Theories

Jacob Nilson is an inspector at the Darlington Facility with John William James
Jacob develops an almost groupie fascination of John William James
In his inspectors notes he shows adoration and almost love towards JWJ
The Inspectors notes labeled from his for episode two and episode three have vastly different handwriting
This tells me the second inspectors notes were not actually written by Jacob Nilson, but possibly by JWJ
This would also explain how JWJ was able to slip a pen knife into the package and get it through inspection and also why JWJ's letter came unopened, he inspected his own package
Is Jacob now deceased or is he a compliant and willing co-conspirator of JWJ at this point?