In case someone on this list can do something about it: the paradigm of using emacs on Ubuntu has changed / is broken. The emacs / emacs-nox packages on all but the latest Ubuntu release appear to be empty.

https://packages.ubuntu.com/xenial/all/emacs/filelist

» Ubuntu » Packages » xenial » emacs » all » File list

File list of package emacs in xenial of architecture all

/usr/share/doc/emacs/changelog.gz
/usr/share/doc/emacs/copyright