The mass of information contained in so small a space, the clearness and accuracy of the details, the immense amount of life which is breathed into the whole, astonish the reader, when he reflects that this colossal task was accomplished by one man, for his collaborator Kolsegg merely filled up his plan with regard to part of the east coast, a district with which Ari in his western home at Stad was little familiar.
By degrees, however, Schiller's historical publications, and, in a higher degree, the magnificent poems, Die Gotter Griechenlands (1788) and Die Kiinstler (1789), awakened Goethe's respect, and in 1794, when the younger poet invited Goethe to become a collaborator in the Horen, the latter responded with alacrity.
This is the version of the expectation of Nero's second coming preserved in the form given to the prophecy, under Domitian, by the collaborator in' the Apocalypse of John (xiii., xvii.).
He is mainly known as a collaborator with the learned historian, Erik Gustaf Geijer, in the great collection of Swedish folk-songs, Svenske folkirsor fran forntiden, 3 vols.
In 1847 he began to act as Privatdozent in the university, and founded with Reinhardt the Archiv fiir pathologische Anatomie and Physiologic, which, after his collaborator's death in 1852, he carried on alone, and in 1848 he went as a member of a government commission to investigate an outbreak of typhus in upper Silesia.