Virgil's Letter

Virgil's letter is a paper note in Fallout 4.

Location
Given by Brian Virgil to the Sole Survivor if he is cured.

Related quest

 * A Loose End

Bugs
If you return to Virgil after you have defeated the Brotherhood of Steel, he will give you this letter to return to Dr. Li. However, the marker for Dr. Li (if you convinced her to join back the Brotherhood) will be floating over the rubble of the downed Prydwen, making it impossible to complete the quest.