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