Among other offices of a kindred nature to the above, it may be mentioned that Sir William was President of the section of Anatomy at the International Medical Congress held in London in August 1881. His address on that occasion (reprinted as article 7 of the volume just cited) being on the Museum of the Royal College of Surgeons. In July 1893 he acted as President of the Museum’s Association at their London meeting, when, after referring to the general scope of that body, and a brief survey of some of the chief museums of Europe, he sketched out a plan for an ideal building of this nature. This address also appears in _Essays on Museums_. Sir William, the year before his death, had also undertaken to preside over the meeting of the International Zoological Congress held at Cambridge in the summer of 1898, but was prevented by failing health; his place being filled by Lord Avebury (Sir John Lubbock). On 29th November 1895, Sir William Flower delivered an address at the opening of the Perth Museum, in which he pointed out the special function of local museums. Five years earlier (3rd November 1890) he had delivered another address on a very similar occasion, namely, the opening of the Booth Museum, in the Dyke Road, Brighton, famed for its unrivalled collection of British birds, the great majority of which had been shot and subsequently mounted in a most artistic manner by its founder. This splendid collection, it may be mentioned, was bequeathed at Mr. Booth’s death to the British Museum, but it was reluctantly declined by the Trustees, who waived their right in favour of the Corporation of Brighton. At the end of October 1896, Sir William, then in failing health, somewhat rashly undertook a journey to Scotland to assist Lord Reay in the inauguration of the Gatty Marine Laboratory at St. Andrews. Another important address delivered by Flower was one read before the Church Congress at their meeting, held in October 1883, at Reading, on “Recent Advances in Natural Science in Relation to the Christian Faith.” It is reprinted in _Essays on Museums_. In this address Flower, while proclaiming his full adherence to the doctrine of the transmutation of species and the evolution of every organic form from a pre-existing type, urged that this did not in the least shake his confidence in all the essential teaching of the Christian religion. At the same time he pointed out that the new doctrine in no wise detracted from the position of the Divine Ruler of the world as the controller, and indeed the originator, of animal development. Shortly after his retirement from the post of Conservator, Professor Flower was elected a Trustee of the Hunterian Collection of the Royal College of Surgeons. Many years later, in 1881, he became a Trustee of Sir John Soane’s Museum, in Lincoln’s Inn Fields.