THE VICTORIA AND ALBERT MUSEUM

The Victoria and Albert Museum (or V&A for short) is the world's largest museum of decorative arts and design. Queen Victoria's address was recorded upon its official naming in 1893: "I trust that it will remain for ages a Monument of discerning Liberality and a Source of Refinement and Progress."

One of the great treasures in the museum is an original wedding invitation from the Queen herself, but upon arriving at the museum you learn that the souvenir version has some interesting details that have Lockhart's sneaky fingerprints all over them. You take one of them and look it over realizing that it contains the key to finding the passphrase you need to find the diamond stashed here.