OT crop eps to printed area

[Alicuota618]

Hello,

Still struggling with gregorian.ly:
So I compile first the gregorian to pdf then convert eps (directly as
dbackend=eps returns inverted black-white and very bad quality), and
include in mybook.ly as
\markup { \epsfile #X #20 #"rorateCoeli.eps" }

but I dont find how to crop the image to printed area.

Can somebody help?

Thanks in advance,

Francois