[1] Ewerbeck's dissertation, written in Latin and accepted in 1839, was entitled De phaenomenis opticis subjectivis (Subjective Phenomena of Optics).
[3] Ewerbeck joined the Paris chapter of the League of the Just (Bund der Gerechten), a utopian socialist organization, and soon became a leading member.
In 1847 it was he who translated Étienne Cabet's influential socialist novel Voyage en Icarie from French into German under the pen name "Dr. Wendell Hippler.
"[4] In August 1846, Ewerbeck introduced Engels to a small group of Parisian cabinetmakers and tanners who supported the revolutionary movement.
Ewerbeck was part of a group including Moses Hess and Karl Ludwig Johann D'Ester that tried to get Marx to abandon Engels.