- History of the Old Polish Law (1879)
- State Law of the Polish-Lithuanian Commonwealth (1888)
- History of the Polish Crown (1895-1906)
- History of the Polish Parliament (1907-1925)
- History of the Polish Sejm (1930-1931)
- History of the Polish Senate (1932)
Articles:
- The Polish State and the Church in the 16th Century (1881)
- The Union of Lublin and the Polish-Lithuanian Commonwealth (1882)
- The Polish-Lithuanian Commonwealth and the Thirty Years' War (1883)
- The Partitions of Poland and their Consequences (1885)
- The Polish National Uprising of 1830-1831 (1894)
- The Polish January Uprising of 1863-1864 (1896)
- The Polish Legions in World War I (1920)
- The Polish-Soviet War of 1920-1921 (1922)