In 1879–1880, he published two volumes of The Historical Poetry of the Ancient Hebrews, Translated and Critically Examined, a work of profound original research.
[3] Towards the end of the fifties when public opinion was crystallizing on the impending war issue, Philadelphia was the scene of a conflict whose bitterness can better be imagined than described.
The speaker on this occasion, all enthusiastic, was convincing his auditors of the justice of their cause when he was suddenly interrupted by the hoots and jeers of a crowd of hoodlums representing the "Copperheads,” who entirely unobserved had entered the meeting.
In breathless excitement he mounted his chair, and in the most vigorous German, reinforced by a remarkable eloquence, delivered such a bitter tirade against the methods of the opposition as to make him at once the object of the mob's resentment.
He was immediately surrounded, severely assaulted, and was about to be rushed bodily out of the hall, when Dr. Edward Morwitz organized his friends upon the platform, made one grand united effort at rescue, and succeeded in tearing him away from the clutches of the angry mob.