My English or French is not good enough to give an exact translation, but in the core Aster says, "that the hate of the Saxons against N. was increased by N.'s order 'to take away the cattle, to burn the forests, to cut the fruit trees and to destroy all food sources before leaving the right bank of the Elbe in order to make a desert for the enemy' The order of N. was carried out by the better thinking French commanders wrt the cattle by which the Saxon farmers lost all their property but the other measures were more or less ignored."
The inner citation in Aster's text is a reference to Odeleben's "Napoleon's Feldzug in Sachsen im Jahre 1813". Odeleben was a Saxon "Verbindungsoffizier" (deputy officer??) in N.'s HQ in the autumn campaign of 1813 and a first hand eyewitness. Aster himself is not only an "1852 author" but himself an (Saxon) eyewitness, too. Aster was artillery officer, took part in the battle of Dresden 1813 and was taken POW by the Austrians when the fortress Dresden surrendered in November 1813. Perhaps has Aster heard of the measures commanded by N. when he was in Dresden between August and November 1813.
Best regards, Thomas