Two vertical lines as breath marks

[Joseph Srednicki]

Hello:

I am working with French baroque organ music. This music uses two vertical lines as breathing marks to indicate a change in registration or manual. See the image in the attached PNG or SVG file. The breathing marks are circled in red.

Can someone recommend how to implement such marks in Lilypond?

I tried to change the breathing mark symbol, but I couldn't find the appropriate character.

Thanks for any recommendation.

Joe Srednicki

breathe_mark_double_lines2.png
Description: PNG image

breathe_mark_double_lines2.svg
Description: image/svg