Peter Wollny
... that the Bach Archive in Leipzig, directed by Peter Wollny, acquired in 2021 Gustav Mahler's copy of the Bach edition, in 59 volumes with handwritten annotations by Mahler?
... that the <a href="./Bach_Archive" id="mwB7E" rel="mw:WikiLink" title="Bach Archive">Bach Archive</a> in Leipzig, directed by <b id="mwB7I"><a href="./Peter_Wollny" id="mwB7M" rel="mw:WikiLink" title="Peter Wollny">Peter Wollny</a></b>, acquired in 2021 <a href="./Gustav_Mahler" id="mwB7Q" rel="mw:WikiLink" title="Gustav Mahler">Gustav Mahler</a>'s copy of the <a href="./Bach_Gesellschaft" id="mwB7U" rel="mw:WikiLink" title="Bach Gesellschaft">Bach edition</a>, in 59 volumes with handwritten annotations by Mahler?