do narrow and bold-narrow font-series exist? How can i squish Lyrics horizontally?

[Janek Warchoł]

Hi,

according to internals
(http://lilypond.org/doc/v2.13/Documentation/internals/lyrictext)
there is something like "bold-narrow" font-series. However the
following snippet doesn't work as expected - ?

\version "2.13.45"

\score {
  <<
  \relative c' { c4 d e f c4 d e f }
  \addlyrics { blah blah blalah blalah \override LyricText
#'font-series = #'bold-narrow blah blah blalah blalah }
  >>
}

I need to make lyrics smaller horizontally, without changing font-size
to smaller. I hoped that maybe a narrow font-series exists, but
bold-narrow and narrow aren't proper values for font-series property.
I also searched for a way to change the distances between individual
letters, but i didn't find relevat properties. Any ideas?

cheers,
Janek