We must tarry a moment longer with these Trios. That the author is disposed to place their origin in the Bonn period has already appeared. Argument in favor of this view can be found in the fact of their early performance in Vienna, for there can be no reasonable question of the correctness of Ries’s story, for which Beethoven himself was authority, that they were played at the house of Prince Lichnowsky, in the presence of Haydn. This performance must have taken place before January 19, 1794, because on that day Haydn started again for England. Now, Beethoven’s sketches show that he was still working on at least the second and third of the Trios after 1794, and that they were not ready for the printer before the end of that year. Further explanation is offered by the following little circumstances: since Haydn was present, the performance at Prince Lichnowsky’s must have been from manuscript. In the morning meeting which probably took place only a short time before the soirée, Beethoven’s attention was called to the desirability of changing in the last movement of the second Trio, the time-signature from 4-4 to 2-4. Beethoven made the change. From these facts it may be concluded that after a first there was a final revision of these Trios and that the former version disappeared or was destroyed after the latter was made. It has repeatedly been intimated that the author believes that the rewriting of compositions completed in Beethoven’s early period is farther-reaching than is generally assumed. The case therefore seems to present itself as follows: Haydn heard the Trios at Lichnowsky’s in their first state; Beethoven then took them up for revision and in the course of 1794 and the beginning of 1795 brought them to the state in which we know them. It is not possible to say positively whether or not the first form, particularly of the first Trio, dates back to the Bonn period.