The Spines of America is a main story mission in Red Dead Redemption 2 given by Hosea Matthews, as part of Chapter 2.
It's the 19° mission in chronological order of the RDR2 story mode, played with protagonist Arthur Morgan.
The Spines of America - Mission Details:
To prove their business credentials to the Emerald Ranch fence, Seamus, Arthur and Hosea attempt to rob a stagecoach from Old Bob Crawford at Carmody Dell.
Mission Objectives
Gold Medal Objectives (100%)
The following are the Mission Objectives required to obtain the Gold Medal in the mission "The Spines of America":
- Loot everything from Carmody Dell
- Don’t get spotted
- Deliver the wagon to Emerald Ranch within 1 minute 10 seconds
Note: You must complete all Gold Medal requirements in one single playthrough of the mission.
The Spines of America: Mission Info
- Mission Number 19
- Story Chapter Chapter 2
- Mission Type Mandatory Mission
- Mission Giver
Hosea Matthews - Protagonist (Playable)
Arthur Morgan - Location From Emerald Ranch to Carmody Dell (The Heartlands, New Hanover)
- Rewards Gang Share: $150.00; Arthur's Cut: $82.50
- Featuring
Stagecoach 
Seamus