Here's how to get the last pages in the gallery
1. When you come across the first three options choose to visit the Blacksmith
2. After there will be a new option the next day called "Confront about Dad" choose that, choose to spy for more pages
3. Don't help the Barbarian, a new option called "Check the Diary" will appear on the next page
4. When Duncan gets kidnapped investigate alone
5. Choose "Demand to know what that was about"
6. Enjoy ;)