At one point you will reach a chained room Jack opens and this is Jack’s Office.
You will have to fight raiders along the way. Jack finally unlocks the building and you should follow him around as he makes his way toward his office. Meet Jack outside Parsons State Insane AsylumThe first few steps of this quest take you to Parsons State Insane Asylum.
Quests you need to finish to get this one are Special Delivery and Emogene Takes a Lover, but we’ll discuss those in another guide. This means that there are heavy spoilers ahead. At the end of this quest you will have a choice to make and that is why we’ve written this guide to tell you the consequences of your choice (in case you are wondering). It is an important side quest chain because it grants you access to Parsons State Insane Asylum, where you’ll find the Charisma Bobblehead, Massachusetts Surgical Journal and you can also receive a unique weapon reward – Lorenzo’s Artifact Gun or Zeta Gun. The Secret of Cabot House is the last in a small chain of Fallout 4 side quests that start when you talk to a Ghoul named Edward Deegan.