Perhaps it was sold after an occaision of sucsessfull performance of "Elfhil" in 1828.(anonymous)
It was written under the postcard " Alley of Love, near Østerbro"
Left is Ludvig Heiberg, who is the writer of "Elfhil. Right is Kuhlau.

Kærlighedsstien ved Østerbro, J. L. Heiberg og Fr, Kuhlau

One can recognize from this postcard, that Kuhlau is tall as Heiberg. Slender. Brings his favarite walking stick and white silk hat..