Comment on Omkring 1.2.1804
The A must be for Alberto, which Thorvaldsen used together with Bertel, see the related article on this. Thorvaldsen, however, was not on a first-name basis with Herman Schubart, so the A may just indicate that he intended to use the signature Alberto Thorvaldsen in the finished letter. See also the related article On Familiar Terms with Thorvaldsen.
Last updated 12.10.2015