He devoted himself ardently to oriental scholarship, and published Zur Urgeschichte der Armenier (1854) and Armenische Studien (1877).
In politics he ardently sympathized with the progressive tendencies of his time, and he was among the earliest and most effective of the political poets who prepared the way for the outbreak of 1848.
In each point the English constitution, which he ardently admires, is, he says, suffering: the prerogatives of the crown are disproportionately great; the peerage has been degraded by new creations; and parliaments are slighted.
He ardently called for the armed intervention of King Louis XIII.
The tone of the letters became very warm, and the cardinal, convinced that Marie Antoinette was in love with him, became ardently enamoured of her.