Honorary secretary, 1863–1888 In November 1854, Markham had been elected a Fellow of the
Royal Geographical Society. The Society soon became the centre of his geographical interests, and in 1863 he was appointed its honorary secretary, a position he was to hold for 25 years. Markham conducted the
Geographical Magazine from 1872 to 1878, when it became merged in the
Proceedings of the Royal Geographical Society. Markham maintained his interest in the navy, particularly in the training of its officers. He often visited the merchant officer training vessels, and
HMS Worcester, and became a member of the latter's governing body. In early 1887 he accepted an invitation from his cousin Albert Markham, who now commanded the Royal Navy's training squadron, to join the squadron at its station in the West Indies. Markham spent three months aboard the flagship , during which, on 1 March 1887, he had his first encounter with
Robert Falcon Scott, who was serving as a midshipman aboard HMS
Rover. Scott was victorious in a race between
cutters, an event that was noted and remembered by Markham.
President, 1893–1905 In May 1888, Markham resigned from his position as RGS Secretary, finding himself at odds with the Society's new policies which appeared to favour education over exploration. On his retirement he was awarded the Society's
Founder's Medal for what were described at the presentation ceremony as his "incomparable services to the Society". The next few years were filled with travel and writing. There were further cruises with the training squadron, and extended visits to the
Baltic and the Mediterranean. In 1893, during the course of one of these journeys, Markham was elected
in absentia president of the society. This unexpected elevation was the result of a dispute within the Society over the question of women members, about which Markham had kept silent. When in July 1893, the issue was put to a special general meeting, the proposal to admit women was narrowly defeated despite an overwhelming postal ballot in favour. In these circumstances the Society's President, Sir
M. E. Grant Duff, resigned his office. The 22 existing women members were allowed to remain, but no more were admitted until January 1913 when the RGS changed its policy. Although Markham was not the first choice as a replacement for Grant Duff—other notable figures were approached—he had kept out of the women members controversy and was broadly acceptable to the membership. Shortly after his accession to the presidency, in recognition of his services to geography Markham was promoted
Knight Commander of the Order of the Bath, and became Sir Clements Markham. there had been no significant Antarctic exploration by any country since Sir
James Clark Ross's expedition fifty years previously. A new impetus was provided through a lecture given to the RGS in 1893, by the oceanographer
John Murray, calling for "an expedition to resolve the outstanding questions still posed in the south." In response to Murray the RGS and the
Royal Society formed a joint committee, to campaign for a British Antarctic expedition. although the "Instructions to the Commander", drawn up by Markham, give equal priorities to geographical and scientific work. The "science versus adventure" arguments were renewed when, after the return of the expedition, there was criticism over the accuracy and professionalism of some of its scientific results. Markham faced further problems in securing funding for the expedition. In 1898, after three years' effort, only a fraction of what was required had been promised. Meanwhile, the Anglo-Norwegian explorer
Carsten Borchgrevink had obtained a sum of £40,000 (over £3 million in 2008) He was equally hostile to
William Speirs Bruce, the Scottish explorer who had written to Markham asking to join the National Antarctic Expedition. On receiving no confirmation of an appointment, Bruce obtained finance from the Scottish
Coats baronets family and organised his own
Scottish National Antarctic Expedition. Markham accused Bruce of "mischievous rivalry", and of attempting to "cripple the National Expedition ... in order to get up a scheme for yourself". The Scottish expedition duly sailed, but Markham remained unforgiving towards it, and used his influence to ensure that its participants received no Polar Medals on their return. A substantial private donation and a government grant finally allowed the National Antarctic Expedition to proceed. A new ship, the , was built, and a mainly naval crew of officers and crewmen appointed, along with a scientific staff which was later described as "underpowered".
Discovery sailed on 5 August 1901, after an inspection by King
Edward VII, at which Markham was present to introduce Scott and the officers. The ship was gone for just over three years during which time, from a base in the
Ross Sea area, significant explorations of this sector of Antarctica were carried out, along with an extensive scientific programme. Although it was reported by the
Times as "one of the most successful [expeditions] that ever ventured into the Polar regions, north or south," it was largely ignored by the government of the day. Markham was criticised in official quarters for privately sanctioning a second season in the Antarctic, contrary to the original plan, and then being unable to raise funds for the expedition's relief in 1904. The cost for this had to be borne on
His Majesty's Treasury. == Later life ==