problem with melisma

[Athanasius Pelletier]

I am trying to get the line to go from the b4 through g2.  All I can get is a broken line.  I tried using the \melisma and \melisma end tags but they didn't work.  Can anybody get this right for me?


\version "2.13.9"

\include "gregorian.ly"

\header {
    subtitle = "Glória"
    subsubtitle = "Ambrosian Chant"
    
}

chant = \relative c' {
  \set Score.timing = ##f
  
  a'4 a a a a a a a g2 \finalis
  
  g4 g a a a a b a a2 \divisioMaior
  a4 a a a a g2 r4 \finalis \break
  
  a4 a a g2 r4 \finalis
  a4 a a a a g2 r4 \finalis
  a4 a a a g2 r4 \finalis
  a4 a a a a g2 r4 \finalis \break
  
  g4 g g g g g g b4 ( a g) c2 d4 ( c b c) a4 ( b a) g2 \divisioMaior  %line from b4 through g2
  c4 c a g f g a g 2 f r4 \finalis \break \finalis

}

verba = \lyricmode {
  Gló -- ri -- a in ex -- cél -- sis Dé -- o.
  
  Et in tér -- ra pax ho -- mí -- ni -- bus bó -- nae vo -- lun -- tá -- tis.
  Lau -- dá -- mus te.
  Be -- ne -- dí -- ci -- mus te.
  Ad -- o -- rá -- mus te.
  Glo -- ri -- fi -- cá -- mus te.
  
  Grá -- ti -- as á -- gi -- mus tí -- bi __ _ _ _ _  %trying to get the line to go up to the next verse
  pró -- pter má -- gnam gló -- ri -- am tú -- am.

}

\score {
  \new Staff <<
    \new Voice = "melody" \chant
    \new Lyrics = "one" \lyricsto melody \verba
    
  >>
  \layout {
  ragged-last = ##f
    \context {
      \Staff
       ragged-last = ##f
      \remove "Time_signature_engraver"
      \remove "Bar_engraver"
      \override Stem #'transparent = ##t
    }
    \context {
      \Voice
      \override Stem #'length = #0
    }
    \context {
      \Score
      barAlways = ##t
    }
  }
}