Great Britain bore testimony by what she did, as well as by what she refused to do. Even while resisting the armed intervention of the great conspiracy, her Government intervened sometimes by mediation and sometimes by arms. Early in the contest between Spain and her colonies she consented to act as mediator, on the invitation of the former, in hope of effecting reconciliation; but Spain declined the mediation she had invited. From 1812 to 1823, Great Britain constantly repeated her offer. In the case of Portugal she went further. Under the counsels of Mr. Canning, whose speech on the occasion was of the most memorable character, she intervened by landing troops at Lisbon; but this intervention was vindicated by the obligations of treaty. Next came the greater instance of Greece, when the Christian powers of Europe intervened to arrest a protracted struggle and to save this classic land from Turkish tyranny. Here the first step was _a pressing invitation from the Greeks_ to the British and French Governments for their mediation with the Ottoman Porte. These powers united with Russia in proffering the much desired intervention, which the Greeks at once accepted and the Turks rejected. Already battle raged fiercely, reddened by barbarous massacre. Without delay, the allied forces were directed to compel the cessation of hostilities, which was accomplished by the destruction of the Turkish fleet at Navarino and the occupation of the Morea by French troops. At last, under the continued mediation of these powers, the independence of Greece was recognized by the Ottoman Porte, and another commonwealth consecrated to Freedom took its place in the Family of Nations. But mediation in Turkish affairs did not stop. The example of Greece was followed by Egypt, whose provincial chief, Mehemet Ali, rebelled, and by genius for war succeeded in dispossessing the Ottoman Porte not only of Egypt, but of other possessions also. This civil war was first arrested by temporary arrangement at Kutaieh, in 1833, under the mediation of Great Britain and France, and finally ended by an armed mediation in 1840, when, after elaborate and irritating discussions threatening to involve Europe, a treaty was concluded at London between Great Britain, Russia, Austria, and Prussia, by which the Pacha was compelled to relinquish his conquests, while he was secured in the Government of Egypt as perpetual vassal of the Porte. France, dissatisfied with the terms of this adjustment, stood aloof from the treaty, which found apology, such as it had, first, in the invitation of the Sultan, and, secondly, in the desire to preserve the integrity of the Turkish Empire, as essential to the balance of power and the peace of Europe, to which may also be added the desire to stop effusion of blood.