"As regards the Cape frontier, for the portion lying between Basutoland and Hopetown railway bridge,[52] the Orange river forms a military obstacle of some importance, impassable, as a rule, during the first three months of the year, except at the bridges, and even at other times difficult to cross, owing to its quicksands, and liability to sudden flood. Between Hopetown railway bridge and the Vaal the frontier is, however, protected by no physical features and lies open to invasion. [Footnote 52: The railway bridge at Orange River station.] "As regards the Natal frontier its salient confers on the enemy facilities for cutting our line of communications, and for outflanking at pleasure the positions of Laing's Nek and the Biggarsberg. This facility is accentuated by the influence of the Drakensberg, which forms a screen, behind which an enemy can assemble unobserved and debouch on our flanks through its numerous passes. These passes, however, have been recently examined and found to be for the most part but rough mountain tracks available for raids, but unsuitable for the advance of any large force accompanied by transport. To this Van Reenen's Pass, through which the railway and main road issue from Natal into the Free State, and Laing's Nek (across and under which the main road and railway pass into the Transvaal) are notable exceptions, and the possession of these two passes necessarily carry with them great strategical advantages. "An appreciation of the relative importance of the defence of the two frontiers of Cape Colony and Natal would, no doubt, be assisted if the line by which the main advance on the Transvaal will ultimately be undertaken were determined; but I am to say that in the Commander-in-Chief's opinion the plan for offensive operations must depend upon the political and military situation of the moment, and cannot now be definitely fixed. The fact, however, that an offensive advance will ultimately be undertaken, as soon as sufficient forces have arrived, must be especially borne in mind in considering arrangements for the first or defensive stage of the campaign."