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