This is the Cigarette Card location for the Leviticus Cornwall card. It is sitting on top of the barrel right outside the north door of the house that's by the pigpen.

Leviticus Cornwall is card 4 in the Prominent Americans set. The reward for completing this set is Three Eagle Feathers and $50.

In addition to the individual set rewards, the reward for completing your first Cigarette Card set is the Vintage Civil War Handcuffs. The handcuffs are required to craft the Alligator Tooth Talisman; A unique item that reduces Dead Eye core drain by 10%.