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Use the key to enter these locked rooms. The puzzle in the reception room was easy and the room was short. The Exhibition rooms will take more time to complete than the lobby section. To the left of the door is another seal. Pick it up. Not far from the seal another statue rests. Turn around to see a mummy on display in the center of the room. Have Holmes look down at the base of the display and find a toolbox. Toolboxes often contain items that players can use later in the game. Click on the toolbox and retrieve a flask of oil, a hammer with a lever and a screwdriver from it.
Adjust Holmes's position so that you can see the Khasapeth Mummy. You will find a few illegible documents here as well as information on the Curse of the Mummy. Take note of this information, and it may be helpful to write it down somewhere because the text about the curse is not immediately useful.
Go to your right until you come to the door at the end of the room. Find 'the pin' underneath the blue stool. Venture to the left and enter another room. Click on the statue of Anubis to search it. The search reveals another seal. The game places it in Sherlock's inventory and proceed to the left again. You will also find a sacrificial knife on one of the shelves. You do not need this at the moment, but you should remember its location. A picture of Elisabeth Montcalfe hang on one of the walls of the room. Pick up the photo and examine it thoroughly. You should find a letter attached to this photo. The most immediately relevant piece of information concerns the presence of traps in Montcalfe's mansion and museum.
Look around the room a little more. You should find a piece of bandage in front of one of the doors. Cross the room again and go to the back doors. You'll find a symbol with four seals on it near the double doors in the back. So far, you have only found three seals so you need to search around for the final seal that allows you to finish the puzzle. An excerpt from the Egyptian Book of the Dead rests on the floor. Examine the excerpt. Be sure to examine nearby pieces such as the Egyptian burial urns and statues of Ancient Egyptian Gods and Goddesses. The information about what each god and goddess did may seem like extraneous flavor at this time. Pay attention to this information. It becomes useful later in the game.