Carl Siewers

“ Though a protestant, his chef-d'œuvre is a Mass for solos, chorus and orchestra, which has only been twice performed in Stockholm, but is considered by his countrymen as equal to any by the great composers, and which is animated by such sincere devotion, and stamped by such a high degree of originality and masterly finish, as to rank among the choicest gems of Swedish music. ”

“ The foreign composers who seem to have influenced his more elaborate productions are Beethoven, Schubert, and, in particular, Schumann. His compositions, though thoroughly Swedish, are not national; they bear the impress of the vigorous and energetic nature of the Northerner, which makes Scandinavian compositions so charming. ”