Agatha ' s Song Agatha ' s Song is a " Fallout 3 " quest . It is also an achievement / trophy . Retrieve the Soil Stradivarius from Vault 92 for Agatha , an old woman living alone in her house in the Capital Wasteland . Detailed walkthrough . Meeting Agatha . Agatha ' s house is northeast of Meresti trainyard and west of the Scrapyard , and is surrounded by piles of rock , except for the small passage from the west over a wood suspension bridge . This bridge is located just west of where the two sets of upraised monorail tracks become parallel to each other . Agatha is an elderly violinist who broadcasts her music through her late husband ' s old radio gear . She wants to get back the Soil Stradivarius , which was owned by her great - great - grandmother ' s sister Hilda . Agatha believes the violin is still in Vault 92 , where the nation ' s best musicians were housed . She offers the frequency of her radio signal as a reward , but with an easy Speech check or a high Charisma , she ' ll also immediately provide the key to her husband ' s ammunition box in exchange for promising to get the violin for her . Having the Lady Killer perk makes the Speech / Charisma check unnecessary . She doesn ' t know the location of the vault , but if asked she can provide the location of Vault - Tec headquarters on the Pip - Boy 3000 . At this point , going to Vault - Tec headquarters is entirely optional , considering that the locations of all vaults in the Capital Wasteland become available while doing the main quest " Picking Up the Trail " . Getting to Vault - Tec headquarters ( Optional ) . Vault - Tec headquarters can be accessed via Vernon Square . Vault - Tec headquarters is close to one exit of the Metro Junction tunnels : Vernon Square North . From Vernon Square , head for the northernmost part to find the Vernon Square North map marker . Vault - Tec headquarters is just next to the Metro Junction exit . Discover the location of Vault 92 . Once inside Vault - Tec headquarters , head for the Vault - Tec mainframe . The building is divided into 3 sections : Guest Relations ( Lobby ) , the Corporate Offices , and the Administration . The building is still protected by several automated units such as protectrons , robobrains , turrets , and , depending on character level and the game difficulty setting , sentry bots . A good supply of pulse grenades should help here . There are also a few remaining super mutant s in the lobby . The mainframe is located in the Administration section . Gaining access to it requires permission from System Operation Stations 1 , 2 and 3 . System Operation Station 1 is in the room at the top of the stairs that lead to the lower level in the Administration room . System Operation Station 2 is in the last room on the left after coming up the stairs from The Guest Relations to Administration . System Operation Station 3 is in a lower level room ( near the door from Administration to Corporate Offices ) on a desk next to another terminal . Alternately , most everything in Administration can be skipped by passing by the System Operation Station 3 into the lower floor of the mainframe room . In the southwest corner of the room , the pipes are laid out so that it is possible to jump onto them , then onto one of the server towers ( the one with the red lights ) under the path to the mainframe . Next , one can simply edge forward while standing on top of one of the server towers until touching the mainframe itself . At this point , it is possible to download the vault locations . Gaining access to the mainframe enables downloading the location of Vault 87 , Vault 92 , Vault 101 , Vault 106 , and Vault 108 onto the Pip - Boy . If the quest ' Picking Up the Trail ' is already active , then the locations of all Vaults will be marked on the Pip - Boy map by Scribe Rothchild in the Citadel laboratory , during the start of the quest . If Vault 92 is already discovered without having gone to Vault - Tec headquarters before accepting the quest , then when the quest begins the optional objective of finding Vault - Tec headquarters will already be marked as accomplished , and the first objective will be to recover the violin from Vault 92 . Recover the Soil Stradivarius from Vault 92 . Vault 92 is infested with mirelurks , mirelurk hunters , mirelurk kings , bloatflies , and radroaches . The Soil Stradivarius is located within the most southwestern room in the Sound Testing section of the Vault on a table . Entering the Vault , go straight , the room should have 3 doors . The door in front leads to the Atrium , the door on the left has signs that say Classroom and Lab and leads directly to the Sound Testing section . The door on the right is unmarked and leads to the Living Quarters containing sheet music , which can be given to Agatha later for another reward . Moving through the vault can be done in at least two ways : At the bottom of the staircase and around a corner is a 4 - way intersection . Directly ahead is an average - locked storeroom with a Stealth Boy , ammunition boxes , medical supplies , and an average - locked safe . To the right is a room with the first mirelurk king ( or mirelurk hunter ) , a jukebox , a soda machine , a refrigerator , and a pre - War book . To the left is a T - intersection . The computer terminal that grants access to the music studio ( and the second mirelurk king or mirelurk hunter ) is to the left of the T - intersection . It also contains a Nikola Tesla and You . The violin is to the right of the T - intersection , with a laser pistol and an Easy - locked safe with another Stealth Boy . Return to Agatha . Upon completion of this quest , Agatha will provide the frequency to her radio channel for the Pip - Boy . It plays violin music and can be heard across the entire Capital Wasteland . Bringing Agatha back a sheet music book , which can be found in Vault 92 and several other locations ( see : sheet music book ) , leads her to turn over the Blackhawk ( a unique . 44 scoped Magnum ) and 12 . 44 Magnum rounds that were previously owned by her husband who passed away . Getting the Blackhawk requires asking for the reward ( second option ) . Being rude towards Agatha causes the Blackhawk ' s condition to be somewhat facetiously halved . Lacking a sheet music book when talking with Agatha again leads her to mention that she needs music paper to write her music on ; she will then make the request to retrieve some for her .