According to the terms of the ultimatum of October 9th, a state of war ensued at 5 p.m. on the 11th. The advance of the Boer forces destined for the attack of Mafeking and Kimberley began on the following day, and by the 14th both places were cut off from Cape Colony. On the 17th the enemy occupied Belmont railway station. To meet these movements the 9th Lancers, the squadrons of which disembarked at Cape Town from India on the 14th, 15th, and 18th, were sent up to Orange River station immediately on their arrival. The 1st battalion Northumberland Fusiliers were also moved by train on the 15th from De Aar to Orange River, being replaced at the former station by a half-battalion of the 2nd battalion King's Own Yorkshire Light Infantry, which reached Cape Town on the 14th, having been brought with extraordinary swiftness from Mauritius by H.M.S. _Powerful_. The Orange River bridge garrison was further strengthened by two 12-pr. B.L. guns manned by Prince Alfred's Own Cape artillery. The first field artillery to land in Cape Colony, the 62nd and half 75th batteries, were, on the evening of their disembarkation, the 25th, entrained at once for Orange River. The 1st Border regiment, which arrived from Malta on the 22nd, was despatched immediately to De Aar, but subsequently, at the urgent request of Sir George White, was sent by train to East London and re-embarked for Natal. Steps were taken to make the Orange River railway bridge passable by artillery and cavalry, by planking the space between the rails. Meanwhile, on the advice of the local magistrate, Colonel Money, who was in command at Orange River, destroyed Hopetown road bridge, eleven miles to the westward, as it was feared the enemy's guns might cross the river at that point. Raiding parties of the Boers had overrun Bechuanaland and Griqualand West and spread proclamations annexing the former district to the Transvaal and the latter to the Free State. On the eastern side of the colony the enemy made no move, but still hung back on the north bank of the Orange River. The British garrison of Stormberg was reinforced by two naval 12-pr. 8-cwt. guns, accompanied by 357 officers and men of the Royal Navy and Marines, lent from Simon's Town by the Naval commander-in-chief. In the opinion of General Forestier-Walker, this reinforcement made this important railway junction, for the moment, reasonably secure. Three months' supplies had been stored at all the advanced posts. [Sidenote: Cape volunteers called out.]