A Manhandled Manservant

 is an unmarked Fallout 3 quest.

Important: This quest must be started before killing the ghouls in the Tenpenny Tower (quest). If the ghouls are killed before talking to Dashwood, he won't reminisce about Argyle and instead the only option to get into his safe is killing him.

Argyle has not been seen since he was seperated from Herbert Dashwood on their escape from Rockopolis. The retired adventurer refuses to believe his manservant died in that battle though, instead believing he is still out there somewhere. Upon visiting Rockopolis and finding Argyle's corpse, the player may return the news to Herbert Dashwood at Tenpenny Tower for a reward.

Dashwood, sad to hear of Argyle's demise (he always thought Argyle would outlast him by at least 100 years), tells the player that his days of adventuring are over and gives the player the key to his safe.

Rewards
Inside the safe are bottlecaps, Mentats, a Mini-Nuke, Rad-X, Schematics for the Bottlecap Mine, a Stealth Boy and Stimpaks.

Bugs

 * Taking the items from the safe has, in at least one case, resulted in loss of karma as it is considered theft (even if Dashwood said otherwise).