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