Dana had written for and managed the "Harbinger", the Brook Farm publication, devoted to social reform and general literature. Later, beginning 1844, he also wrote for and edited the Boston "Chronotype" of Elizur Wright for two years. In 1847 he joined the staff of the "New York Tribune", and in 1848 he wrote from Europe letters to it and other papers on the revolutionary movements of that year. In Cologne he visited Karl Marx and Ferdinand Freiligrath. (From 1852 to 1861, Marx was one of the main writers for the New York Daily Tribune).