/usr/share/help/C/ is in seahorse 3.18.0-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/help/C/seahorse/
/usr/share/help/C/seahorse/about-diff-private-public.page
/usr/share/help/C/seahorse/about-pgp.page
/usr/share/help/C/seahorse/about-ssh.page
/usr/share/help/C/seahorse/concepts.page
/usr/share/help/C/seahorse/glossary.page
/usr/share/help/C/seahorse/index.page
/usr/share/help/C/seahorse/introduction.page
/usr/share/help/C/seahorse/key-servers-add.page
/usr/share/help/C/seahorse/keyring-change-default.page
/usr/share/help/C/seahorse/keyring-create.page
/usr/share/help/C/seahorse/keyring-lock.page
/usr/share/help/C/seahorse/keyring-unlock.page
/usr/share/help/C/seahorse/keyring-update-password.page
/usr/share/help/C/seahorse/keyring.page
/usr/share/help/C/seahorse/legal.xml
/usr/share/help/C/seahorse/media/
/usr/share/help/C/seahorse/media/seahorse.png
/usr/share/help/C/seahorse/misc-key-backup.page
/usr/share/help/C/seahorse/misc-key-fingerprint.page
/usr/share/help/C/seahorse/passwords-stored-create.page
/usr/share/help/C/seahorse/passwords-view.page
/usr/share/help/C/seahorse/pgp-create.page
/usr/share/help/C/seahorse/pgp-delete.page
/usr/share/help/C/seahorse/pgp-expiration-change.page
/usr/share/help/C/seahorse/pgp-expired.page
/usr/share/help/C/seahorse/pgp-export.page
/usr/share/help/C/seahorse/pgp-import.page
/usr/share/help/C/seahorse/pgp-photoid.page
/usr/share/help/C/seahorse/pgp-publish.page
/usr/share/help/C/seahorse/pgp-retrieve-remote.page
/usr/share/help/C/seahorse/pgp-sign.page
/usr/share/help/C/seahorse/pgp-subkeys.page
/usr/share/help/C/seahorse/pgp-sync.page
/usr/share/help/C/seahorse/pgp-userid-add.page
/usr/share/help/C/seahorse/pgp-userid-primary.page
/usr/share/help/C/seahorse/pgp-userid-remove.page
/usr/share/help/C/seahorse/pgp-userid.page
/usr/share/help/C/seahorse/ssh-connect-remote.page
/usr/share/help/C/seahorse/ssh-create.page
/usr/share/help/C/seahorse/ssh-export.page
/usr/share/help/C/seahorse/ssh-import.page
/usr/share/help/C/seahorse/subkeys-add.page
/usr/share/help/C/seahorse/subkeys-examine.page
/usr/share/help/C/seahorse/subkeys-revoke.page