Acaso Sao Estes
This is an anonymous 19th century Modinha, a musical form from Brasil which has some likeness with the Portuguese Fado. The somewhat cryptic title -Just In Case it is You.. suggests it’s a love song. A lyrical beginning ends in a quick waltz.
If you want to play this music: it is part of the collection Conselhos, available with Muziekuitgeverij Van Teeseling, Nijmegen Holland, number VT348