Walkthrough for Biographies and Lies of Red Dead Redemption: Undead Nightmare.
1. Go to the green question mark at the Casa Madrugada in left of Diez Coronas.
2. London asks you for Undead Bait and Dynamite.
Undead Bait: You can build this with "Build: Undead Bait" in Kit section of your Inventory, if you have Prairie Poppies (can be found in Great Plains, West Elizabeth, right side of the map) and Wild Feverfew (can be found anywhere in New Austin, areas around Rio Bravo and Armadillo). You need one of each, after getting them go to Inventory and then into Kit and Info on Build: Undead Bait and Use.
Dynamite: It's rare but killing zombies and looting their bodies can sometimes give you one. If you haven't got any by killing zombies just go down where you found London to the El Matadero, saving this place will award you four dynamites.
3. Get back to London marked with LR at the Casa Madrugada.
