^Howard Hartog - European Music in the Twentieth Century 1961 - Page 312 This is not to belittle the work of such composers as Feliks Nowowiejski (b. 1877), who wrote much noble organ music and an opera, The Legend of the Baltic, full of patriotic fervour. But stylistically it was rooted in the nineteenth century.
^Tricia Cusack - Art and Identity at the Water's Edge 2012 - Page 41 "... were also sea-focused musical pieces and the composer most strongly fascinated by the sea was Feliks Nowowiejski, ... In 1919, he composed A Hymn to the Baltic; in 1924, the Poznan Opera House staged the premiere of his Legend of ..."
^Polish perspectives Polski Instytut Spraw Międzynarodowych - 1968 -- Volume 11,Numéros 1 à 6 - Page 91 "Feliks Nowowiejski (1887-1946), composer, organist and orchestra conductor, was the author of the opera The Legend of the Baltic, the song The Oath to the text by Maria Konopnicka, and many other works for orchestra, choir, ..."