\font\SILmfont={[/usr/local/texlive/texmf-local/fonts/opentype/p22/P22UndergroundPro/P22UndergroundProLight.otf]:+clig;+liga;+tlig;+smcp}\SILmfont
\def\SILmfontname{P22UndergroundPro-Light; Small Capitals}%
