From the middle of September, Marshal Keith, as was observed, with Half of the Prussians, Duke Ferdinand of Brunswick under him, has been on the Bohemian slope of the Metal Mountains; securing the roads, towns and passes thereabouts, and looking out for the advance of Marshal Browne from the interior parts. Town of Aussig, and the River-road (castle of Tetschen, on its high rock known to Tourists, which always needs to be taken on such occasions), these Keith has secured. Lies encamped from Peterswalde to Aussig, the middle or main strength of him being in the Hamlet of Johnsdorf (discoverable, if readers like): there lies Keith, fifteen miles in length; like a strap, or bar, thrown across the back of that Metal-Mountain Range,--or part of its back; for the range is very broad, and there is much inequality, and many troughs, big and little, partial and general, in the crossing of it. A tract which my readers and I have crossed before now, by the "Pascopol" or Post-road and otherwise; and shall often have to cross! Browne, vigorously astir in the interior (cannon and equipments coming by relays at such a pace), is daily advancing, with his best speed: in the last days of September, Browne is encamped at Budin; may cross the Eger River any day, and will then be within two marches of Keith. His intentions towards Pirna Country are fixed and sure; but the plan or route he will take is unknown to everybody, and indeed to Browne himself, till he see near at hand and consider. Browne's problem, he himself knows, is abundantly abstruse,--bordering on the impossible; but he will try his best. To get within reach of the Saxons is almost impossible to Browne, even were there no Keith there. As good as impossible altogether, by any line of march, while Keith is afoot in those parts. By Aussig, down the River, straight for the interior of their Camp, it is flatly impossible: by the south or southeast corner of their Camp (Gottleube way), or by the northeast (by Schandau way, right bank of Elbe), it is virtually so,--at least without beating Keith. Could one beat Keith indeed;--but that will not be easy! And that, unluckily, is the preliminary to everything. "By the Hellendorf-Hennersdorf side, in the wastes where Gottleube Brook gathers itself, Browne might have a chance. There, on that southeast corner of their Camp, were he once there to attack the Prussians from without, while the Saxons burst up from within,--there," thinks a good judge, "is much the favorablest place. But unless Browne's Army had wings, how is it ever to get there? Across those Metal-Mountain ranges, barred by Keith:--by Aussig, with the rocks overhanging Elbe River and him, he cannot go in any case. Were there no Keith, indeed (but there always is, standing ready on the spring), one might hold to leftward, and by stolen marches, swift, far round about--!