/usr/share/emacs/ is in muse-el 3.20-2ubuntu1.
This file is owned by root:root, with mode 0o755.
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/usr/share/emacs/site-lisp/
/usr/share/emacs/site-lisp/muse-el/
/usr/share/emacs/site-lisp/muse-el/contrib/
/usr/share/emacs/site-lisp/muse-el/contrib/cgi.el
/usr/share/emacs/site-lisp/muse-el/contrib/htmlize-hack.el
/usr/share/emacs/site-lisp/muse-el/contrib/httpd.el
/usr/share/emacs/site-lisp/muse-el/experimental/
/usr/share/emacs/site-lisp/muse-el/experimental/muse-cite.el
/usr/share/emacs/site-lisp/muse-el/experimental/muse-mathml.el
/usr/share/emacs/site-lisp/muse-el/experimental/muse-message.el
/usr/share/emacs/site-lisp/muse-el/experimental/muse-protocol-iw.el
/usr/share/emacs/site-lisp/muse-el/experimental/muse-split.el
/usr/share/emacs/site-lisp/muse-el/muse-autoloads.el
/usr/share/emacs/site-lisp/muse-el/muse-backlink.el
/usr/share/emacs/site-lisp/muse-el/muse-blosxom.el
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/usr/share/emacs/site-lisp/muse-el/muse-mode.el
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/usr/share/emacs/site-lisp/muse-el/muse-project.el
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/usr/share/emacs/site-lisp/muse-el/muse.el