%
% \immediate\write 16{Ledger lines kept a version T.58}%
\def\h@linei{%
  \y@ii\n@v\internote
  \y@iii\y@ii
  \advance\y@ii\hlthick
  \advance\y@iii-\hlthick
  \y@iv\y@v
  \advance\y@iv\h@lf\qn@width
  \kernm.25\qn@width
  \vrule\@height\y@ii\@depth-\y@iii\@width\y@iv
  \kernm\y@iv\kern.25\qn@width}
\endinput