New on Claves (https://www.claves.ch/collections/new-releases/products/lieber-freund-sonatas-by-brahms-rontgen-von-herzogenberg): «Lieber Freund» - Sonatas By Brahms, Röntgen & von Herzogenberg
Specifically:
Röntgen: Sonata for Cello and Piano No.5 in B Minor, Op.56
Herzogenberg: Sonata for Cello and Piano No.1 in A Minor, Op.52