He published, in 1856, a volume of poems entitled: De laatste Dochter der Hohenstaufen, on subjects chiefly from the Middle Ages.

Then came a series of historical works, first among which was Het Katholicismus in betrekking met de beschaving van Europa (Amsterdam, 1856–1857, in 2 volumes), a history of the influence of Catholicism upon the culture and civilization of European nations.

In several pamphlets and in a voluminous work, Geschiedenis der Regering van Pius IX (Amsterdam, 1862–63), he treated the Roman question of 1859.

eeuw (Amsterdam, 1865–70, in 8 parts), a history of the revolutionary wars of the Netherlands from 1559 to 1598, discloses no new sources, but shows what rights Catholics were entitled to in the State.

Intended for popular reading are: He published a number of pamphlets and articles in periodicals on topics of the times, especially in Onze Wachter, edited by him from 1871 to 1874 in collaboration with Herman Schaepmann.