Petronella Swenson Ekblad was my great-grandmother. It seemed to me that an unusual name (to me) like that deserved to be saved from oblivion, so this somewhat unusal sonata bears the name "Petronella Sonata". The first movement:
This might have been called "Petronella Surprise" for reasons which I hope become clear as the work progresses. The mp3 is as usual, GPO Steinway.
The second movement is finished, but in a cooling off period now. The third movement is working it's way through the manuscript paper now.
The link will lead to three choices.
At the top, you will see a blue button to play the mp3.
Just below that, you will see the score, if you have the Scorch plugin. Otherwise, a blank where the score ought to be. Here you can view the score and listen to the Scorch playback (GM), not a good sound, usually.
Below this, under the heading of details, you will see a choice to download the mp3 file, which is the best choice if you want to hear, and don't have broadband. The mp3 is the GPO Steinway.