Assassins on a square containing a Chest can spend 1 to open it: Take the card on top of the Chest deck, remove the Chest miniature from the Map and take 1 Chest token (flip it and keep it close to you until the end of the Memory).
Tip: You may place 1 Chest token under each Chest miniature as a reminder.
An Assassin can open a Chest on their square if they are incognito. If they are exposed, they can open it provided there are no Enemies on their square.
Note: Inside some of the envelopes, you will find Chest decks. You have a limited number of Memories to retrieve all the Chests from each Chest deck. Otherwise they will be permanently discarded!