Professor Layton and the Diabolical Box/Chapter 7: An Encounter at the End of the Line

Having finally arrived at Herzen Castle, Layton is close to finding out the truth about Folsense and the vampire that supposedly haunts the castle.

Anton
At the castle exterior there are 3 hint coins, one on the right light above the door, one in the light to the left of the door and one in the lower-right crack of the bridge. To enter the castle, you must have solved at least 80 puzzles, which you should have if you were following the guide. A butler will welcome Layton and Luke and take them to the castle's owner, Anton. After a brief conversation, Luke and the Professor will be left at a guest room.

In this room there are a total of 4 hint coins, one on the chair, one in the standing lamp, one on the tip of the railing and one on the flower vase. Check the painting on the back wall to trigger Puzzle 130. After a cutscene, Luke and Layton will awaken to find themselves captives of Anton, who turns out to be the vampire. After the scene ends, you will automatically trigger Puzzle 131.

Escaping the castle
There are another three hint coins in this room, one on top of the barrel, one in the bucket behind the tarp and one in the box on the top shelf. Check the door to trigger Puzzle 133, which will let you escape. Outside, check the dusty spot on the top left, the small machine at the bottom-left and the top of the barrels for 3 hint coins. Check the top door to find that it is out of power, then enter the boiler room through the lowest door.

Upon entering, you will trigger Puzzle 134. Check the lever, the railing on the right and a dent in the planks at the lower-right for hint coins. You can take a photo of the area if you have the camera assembled, which will reveal Puzzle 88 on the railing after solving the minigame. Exit and go through the top door this time. Check the handle in the cart, the jutting-out brick and the cup on the shelf for hint coins. Inspect the chute to trigger Puzzle 135, which will let you proceed.

In the dining room, check the chandelier, the top of the chair at the front and the shadow of the tablecloth for hint coins. Talk to Nigel to trigger Puzzle 136. Move down to reach a corridor. Check the end of the closest railing, the mounted lamp and the top of the first flight of stairs in the back for hint coins. Move down again to reach the hall, where you can get 3 more hint coins by checking the top of the left handrail, the lamp to the right of the door and the base of the right pillar. Check the picture of Anton to trigger Puzzle 132.

The final encounter
While Professor Layton intends to stay in the castle to get to the truth of the mysterious events at Folsense, you can always leave by moving down from the hall, which lets you return to Folsense to take care of any puzzles you missed. Move forward to find Katia and talk to her to trigger a cutscene. Now Anton will have a fencing duel with Layton, but lets him choose a weapon. You will automatically start Puzzle 138.

After several cutscenes, you will be able to solve your final puzzle of the story: Puzzle 138. You have completed Professor Layton and the Diabolical Box, but there are a few extra puzzles that will push your puzzle-solving skills to the limit. As always, StrategyWiki will be here to provide the solutions, so check here if you're really stuck.