On Horatio Nelson's last day on dry land before joining his ship to fight in the Battle of Trafalgar, he stored a valuable diamond necklace in a chest in one of Portsmouth’s many taverns for safekeeping. That night, the tavern was broken into and the necklace was stolen. You must solve the clues, eliminate suspects, and return to the scene of the crime to get to the bottom of this historic mystery. With 18 clues to solve and five pubs to discover, head off in search of the elusive diamond thief. Your adventure begins at the Grand Parade in Old Portsmouth before winding through the old streets and alleys of the old town, passing key historical sights including Portsmouth Cathedral, the Square and Round towers, the Hotwalls Studios, and Spice Island. This treasure hunt is the best way to see the key historical sights in the city, visit the most atmospheric taverns, and soak up true local stories of its most notorious characters and places. The mystery is complete when you return to the scene of the crime and catch the diamond thief who can still be found lurking somewhere in the city.