For a charming week we wandered up the Valley of the Rhone, and then, branching off at Leuk, we made our way over the Gemmi Pass, still deep in snow, and so, by way of Interlaken, to Meiringen. It was a lovely trip, the dainty green of the spring below, the virgin white of the winter above; but it was clear to me that never for one instant did Holmes forget the shadow which lay across him. —The Final Problem