I just bought this interesting book about Prussian irregular forces from the Napoleonic Wars. It has some interesting pictures.

Heres the title page.

Freikorps 1806/07
1,2: Infantryman, Von Schill’s Freikorps
3: Light Infantryman, Kalckreuth’s Freikorps

Freikorps 1806/07
1,2: Officer and Grenadier Jaeger,
Grenadier Jaeger Co. Von Sell
3: Grenadier, ‘Brown’ Gren. B. von Losthin

Militia 1813-15:
1. Officer, Silesian Militia, autumn 1813
2. Militiaman, 1815
3. Officer, Westphalian Militia 1815

Foreign formations, 1813-15
1. Private, Thuringian Bn. Autumn 1813
2. Gerg Grenadier, 1814
3. Infantryman, Russo-German Legion 1812-14

Foreign troops and Freikorps, 1813-15
1. Hussar, 1st Hussar Regt., Russo-German Legion, 1812-15
2. Gunner, Horse Artillery, Russo-German Legion
3. Infantryman, Hellwig’s Raiding Corps, 1813

Foreign troops and Freikorps, 1813-15
1. Hussar, Hellwig’s Raiding Corps, 1813
2. Jaeger, Luetzow’s Freikorps, 1813-15
3. Musketeer, Inf. Regt. No. 28, 1815