Written in 1915, and designated "op. 49".
Cello and piano (W091)
Violin and piano (W092)
The premiere performance was by the composer on cello, with his wife Lucilia playing the piano. This event took place on 29/1/15, in Nova Friburgo's Teatro D. Eugênia.
The violin and piano version premiere was later that year in the Salão Nobre in Rio (11/13/1915).