 He died in Paris, and is buried at the Cimetière d´Auteuil.Among his published works, Tellefsen wrote sixteen mazurkas, five chamber music works (two sonatas for violin and piano, a sonata for cello and piano, a sonata for two pianos, and a trio for piano, violin and cello), composed between 1854 and 1867.He also wrote two piano concertos, the first in 1848 and the second in 1853, six waltzes, four nocturnes, three études, and a number of larger works and salon pieces, which were written for the teaching of his pupils.