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