For in the discussion of the measures urged by Lord Milner as necessary for the protection of the Colony, the question of arming the natives and coloured people had necessarily arisen. The Bastards in the west and the Tembus in the east were known to be eager to defend the Queen's country against invasion. Mr. Schreiner declared that to arm the natives was to do violence to the central principle upon which the maintenance of civilisation in South Africa was based--the principle that the black man must never be used to fight against the white. Lord Milner did not question the validity of this principle; but he maintained--and rightly, as Mr. Schreiner admitted subsequently by his action in the case of the Tembu frontier--that it could not be applied to the case in question. "If white men," he said, "will go and invade the territory of the blacks, then the blacks must be armed to repel the invasion." The change which came over Mr. Schreiner's attitude, due, no doubt, partly to his gradual enlightenment as to the real aims of the republican nationalists, but also to the skilful use which Lord Milner made of that enlightenment, may be traced in the following contrasts. Before the Boer invasion he refused to call out the local forces of the Colony even for purposes of defence;[168] afterwards he not only sanctioned the employment of these forces in the Colony, but allowed them to take part in Lord Roberts' advance upon Bloemfontein and Pretoria. Before the invading Boers, having already possessed themselves of the north-eastern districts of Cape Colony, began to threaten the purely native territories to the south, he would not hear of the natives being armed for their own protection. But when the Boers had actually reached the borders of Tembuland he consented. In his advice to the Cape Government, no less than in that which he gave to the Home Government, Lord Milner was shown to be in the right. In both cases he urged an effective preparation for war. In both the measures which he advised were ultimately taken; but taken only when they had lost all their power as a means of promoting peace, and half of their efficacy as a contribution to the rapid and successful prosecution of the war. In both cases Lord Milner was able, in the face of unparalleled obstacles, to secure just the minimum preparation for war which stood between the British Empire and overwhelming military disaster. [Footnote 168: The Kimberley and Mafeking Volunteers were called out at the last moment, but actually before the war broke out; but the safety of both these places was imperilled by the refusal, or delay, of the colonial Government to supply them with guns.]