Frederick concentrated his army at Konopischt, very near Beneschau. He could bring into the field sixty thousand men. Prince Charles was at the head of seventy thousand. In vain the Prussian king strove to bring his foes to a pitched battle. Adroitly Prince Charles avoided any decisive engagement. Frederick was fifty miles from Prague. The roads were quagmires. November gales swept his camp. A foe, superior in numbers, equal in bravery, surrounded him on all sides. The hostile army was led by a general whose greater military ability Frederick acknowledged. A council of war was held. It was decided to commence an immediate and rapid retreat to Silesia. Prague, with its garrison of five thousand men, and its siege artillery, was to be abandoned to its fate. Word was sent to General Einsiedel to spike his guns, blow up his bastions, throw his ammunition into the river, and to escape, if possible, down the valley of the Moldau, to Leitmeritz. Frederick divided his retreating army into two columns. One, led by the young Leopold, was to retire through Glatz. The other, led by Frederick, traversed a road a few leagues to the west, passing through Königgratz. It was an awful retreat for both these divisions--through snow, and sleet, and mud, hungry, weary, freezing, with swarms of Pandours hanging upon their rear. Thousands perished by the way. The horrors of such a retreat no pen can describe. Their very guides deserted them, and became spies, to report their movements to the foe. On one occasion the king himself narrowly escaped being taken prisoner. One of his officers, General Trenck, gives the following graphic narrative of the incident: “One day the king entered the town of Collin, with his horse and foot guard and the whole of the baggage. We had but four small field-pieces with us. The squadron to which I belonged was placed in the suburb. In the evening our advanced posts were driven back into the town, and the huzzas of the enemy followed them pell-mell. All the country around was covered with the light troops of the Austrians. My commandant sent me to the king to take his orders. “After a long search, I at length found him in a tower of a church, with a telescope in his hand. Never had I seen him in so much perplexity and anxiety as at this moment. The order he gave me was, ‘You must get out of this scrape as well as you can.’ I had hardly got back to my post when his adjutant followed me with a new order to cross the town, and to remain on horseback with my squadron in the opposite suburb. [Illustration: THE KING IN THE TOWER AT COLLIN.]