Need volta repeat brackets for a Trumpet+Piano "great big staff?"

[Kenneth Wolcott]

Hi;

  I need volta repeat brackets for a Trumpet+Piano "great big staff?".

  I see the section in the Notation Reference and a section in the
Snippet Reference regarding volte multi-staff, but I'm confused when I
already have a PianoStaff and I have a Trumpet above it.  Do I use a
GreatStaff surrounding a PianoStaff?

I have attached the origin pdf, my Lilypond source and my engraving.

Both pdf files have the same name, sorry about that.  The larger one
is the origin and the smaller one is my engraving.

Thanks,
Ken Wolcott

When_a_Child_Is_Born.pdf
Description: Adobe PDF document

When_a_Child_Is_Born.ly
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When_a_Child_Is_Born.pdf
Description: Adobe PDF document