His library grew very comprehensive, especially in keyboard compositions and productions, and, together with the instrument collection, evolved into a museum housed in his Johannesburg home. Tours for University students were sometimes conducted, and the SABC periodically aired early composers' works which he would perform there, (often together with touring overseas performers) on authentic Harpsichord(s) or a Clavichord or Hammerklavier. Most of the musicians and groups touring Southern Africa through his invitation, between 1954 and 1978 were invited to browse in the Library and or try out the instruments. A number discovered interesting or little-known works. (See note 7 in: examples of unusual works referenced.) The Fine Arts Departments of South African Universities were very interested in the Museum (which was considered by some musicologists to be one of the more outstanding museums of this nature in private hands), and it was eventually willed to the University of the Witwatersrand in Johannesburg, who opened a "Hans Adler Memorial Museum" in their Arts Building in 1980. [[File:Maurice Ravel's original publication of "Frontispice" in Feuilles d'art magazine, 1919.jpg|thumb|right|The collection,s Frontispice by Ravel, published in 1919, then withdrawn due to copyright infringements, and officially published after WW2]] [[File:Hans Adler shows off a first edition of Leopold Mozart's "Violin Schule" from his music library.jpg|thumb|right|Hans Adler's 1st edition copy of Leopold Mozart's "[[Versuch einer gründlichen Violinschule]]"]] [[File:HA_incunabula_boetius.jpg|thumb|right|3 pages from collection,s 1492 Boetius Incunabula: Arithmetica Geometrica Musica,]]  [[Category:1904 births]] [[Category:1979 deaths]] [[Category:South African musicologists]] [[Category:South African collectors]] [[Category:Music promoters]] [[Category:20th-century musicologists]]