Malcolm Graheme was not present at the siege of Ingolstadt.

The orders after crossing the Lech had been very strict against straggling, so soon as the disposition of the country people was seen; but it is not easy to keep a large column of troops in a solid body.

The regiments in the march indeed, under the eye of the officers, can be kept in column, but a considerable number of troops are scattered along the great convoy of wagons containing the tents, stores, and ammunition of the army, and which often extends some miles in length.

Even if the desire for plunder does not draw men away, many are forced to fall behind either from sickness, sore feet, or other causes.
The number of these was comparatively small in the army of Gustavus, for discipline was strict and the spirit of the troops good.

As soon, however, as it was found that every straggler who fell into the hands of the peasantry was murdered under circumstances of horrible atrocity it became very difficult for the officers to keep the men together, so intense was their fury and desire for vengeance against the savage peasantry, and on every possible occasion when a village was seen near the line of march men would slip away and slay, plunder, and burn.
Gustavus endeavoured to repress these proceedings.