We must pass over the operations in Brandenburg, where the Scots Brigade distinguished itself repeatedly, and come forthwith to Saxony, whither Gustavus had been called from the Oder by Tilly's advance upon Magdeburg. Arriving too late to save the unhappy city he entrenched himself at Werben, at the junction of the Elbe and the Havel, and gave the world a first notable example of his skill as an engineer. Tilly, having lost six thousand men in the vain attempt to storm the entrenchments, invaded Saxony, whither Gustavus at once followed him and offered him battle on the plain of Leipsic. On the 7th of September Tilly took up his position facing north, on a low line of heights running from the village of Breitenfeld on the west to that of Seehausen on the east. His army was drawn up in a single line. On each wing as usual was posted the cavalry, seven regiments under Pappenheim on the left, seven more under Furstenburg on the right, all drawn up in the dense columns beloved of Charles the Fifth. In the centre was Tilly himself, with eighteen regiments of infantry, his famous Walloons among them, massed together in the old heavy Spanish formation. On the heights above him were his guns. The whole force numbered forty thousand men, and their General was a man who, though seventy years of age, had never lost a battle. [Sidenote: Sept. 7.] On the other side the armies of Gustavus and of his allies the Saxons were drawn up in two lines. On the left were the Saxons, fourteen thousand strong, and on the right, with which alone we need concern ourselves, the Swedes. In touch with the Saxon right, the Swedish left under Field-Marshal Horn was made up, both in the first and second lines, of six regiments of horse, with four platoons of musketeers between each regiment. The right wing under Gustavus himself was similarly composed. In the centre the first line was made up of four half brigades of foot, supported by a regiment of cavalry and eight platoons of Scots; and the second line of three brigades, of which Hepburn's was one. In rear of both lines was a reserve of cavalry, and in the extreme rear a further reserve, the first ever seen, of artillery.