This Old House

 refers to an unmarked and repeatable quest in Fallout 3.

Speak with Winthrop in the Underworld at the Museum of History to unlock the option to bring him 5 pieces of Scrap Metal to exchange for 1 Stimpaks 1 RadAway or 1 Rad-X. This quest is very similar to Walter's Scrap Metal.

This quest can be side-stepped if your Strength, Small Guns, Big Guns Melee Weapons or Energy Weapons skill is high enough to threaten Winthrop into giving you all the Chems he has