Here is the full list of all 27 Herald: An Interactive Period Drama - there are Book I & II achievements.
Witness a performance.
Find the monster.
Find stolen goods.
Get your hands dirty.
End the quarrel.
Successfully convince the senator.
Bring food to the prisoner.
Discover the horrible truth.
Make the boatswain's favourite grub.
Completely blend in while serving tea.
The officer gets his way.
Save a life.
Listen in on a prayer.
Go against the captain.
Betray the boatswain.
Negotiate a compromise.
Tell the boatswain off.
Refuse ill-gotten gains.
Push the boy too far.
Fail to prevent a desperate act.
Serve the senator a highly flavoured meal.
Read the boy's letter.
Be consistently rude to the senator.
Remind the cook about his own pet peeve.
Demand the truth.
Make a sacrifice to keep order.
Fail to prevent a flogging.