While waiting for Dave to finish in the Tintin exhibition, I popped into the other free exhibition at Somerset House - the Museum of Innocence. Small and fascinating, based on Orhan Pamuk's book of the same name.
When he wrote the book, he scoured Instanbul on the hunt for objects which he wove into the book's story. He then opened a museum in Istanbul displaying all the objects in window cases - one for each chapter of the book.