A Test of Faith is a Stranger Mission Strand (Side Questline) in Red Dead Redemption 2. This Walkthrough shows how to complete this Stranger Mission in RDR2.
Quest Giver: Deborah MacGuiness
Region: New Hanover, The Heartlands (near Chapter 2 campsite)
Requirements: available in Chapter 2
Reward: Skull Statue, Jaw Bone Knife (Melee Weapon)
A Test of Faith Starting Location
Find 30 Dinosaur Bones
Refer to the Dinosaur Bones Locations Guide with a map, images and video.
Send All 30 Locations to Deborah MacGuiness
After you found all 30 bones, go to any post office and mail the coordinates to Deborah MacGuiness. Post offices are marked on the map in every major town, e.g. in Valentine. Then sleep for 1 day and come back to the post office find an invitation to Deborah MacGuiness’s hut in your mail.
Collect your Reward from Deborah MacGuiness
Read the invitation you got in the mail (press 
to open satchel and find it under documents, invitations) or rest for a few hours. Then a white quest icon must show up north-east of Valentine for Deborah MacGuiness’s location. Go there and she will present you the restored dinosaur skeleton and give you a secret weapon, the Jaw Bone Knife, made out of dinosaur bone.
Then the mission ends and it checks off the dinosaur bones from your collectibles for 100% completion.
This concludes the “A Test of Faith” Stranger Mission in Red Dead Redemption 2 (RDR2). For all other Stranger Missions check out the full Red Dead Redemption 2 Stranger Missions Walkthrough.
I delivered all locations, got the invitation but quest marker white circle doesn’t appear… Any one had this problem?
Did you open the invitation that was received in the mail? After you do, then the white area appears.
Why can’t I use the knife that Deborah macguiness gives me
is it possible to finish this quest as arthur? because the rest of the bones I need to find are in blackwater