Where do you find the last photograph piece in Professor Layton and Pandora's Box?

When you are working on Puzzle number 116, The Torn Photo and have already talked to Rory after collecting the 15 puzzle scraps. After you talk to Marina and serve her Tea 4 root Remedy you walk left and pick up the Photo scrap 16 from on top of the gate. I have added a link to puzzle number 116 under related questions.