Nor was this all. At an early period during the rearrangement of the mammal galleries, Sir William suggested that many of the larger species might be mounted upon imitation ground-work covering the entire floor of the cases in which they were exhibited. This idea was forthwith put into execution in several cases, notably in these containing the lions, the tigers, and the group of fur-seals from the Pribiloff Islands, presented by Sir George Baden-Powell. Supposed difficulties with regard to the cleaning of the glass of the cases prevented this plan from being carried out to any greater extent during Sir William’s life-time. But these presumed difficulties were subsequently overcome, and of late years a considerable number of the cases containing the larger species of mammals have been treated in this manner with excellent effect and a vast increase to the general attractiveness of the museum. In some instances a merely conventional ground-work has been introduced, but in others a more realistic effect has been attempted. A notable example of this is the reindeer-case, in which the artificial ground-work is covered with rocks, lichen, moss, and birch-stems obtained from the reindeer pastures of Norway. Similarly, the Arctic musk-oxen have been placed on an imitation snow-slope. Although, as already said, much of this work has been carried out since his death, the idea originated entirely with Flower. A similar grouping of animals on artificial ground-work—when possible in imitation of the natural surroundings—has been instituted in some of the American museums, but whether following Flower’s lead, or as an original inspiration, I am unable to say.