Georg Hassel in his 1805 book gives the ethnic structure of the Kingdom of Prussia:
Nationalverschiedenheit:
Deutsche - 5,286,000
Slawen - 4,212,900
Juden - 250,000
Franzosen - 65,000
Griechen - 39,000
Wallonen - 2,600
Tataren - 500
Total population - 9,856,000
However, Hassel does not...