Mensural ligature

[Jean-Charles Malahieude]

Hi all!

On my way to typeset a mass by Monteverdi, I'm blocked with some 
ligatures (see 
http://musicofyesterday.com/historical-music-theory/expanded-history-musical-notation-part-4/ 
for examples)
I can code the first one in its 8th image like this:

  << \tag #'Urtext { \[ d1 e1*3/4 \] }
     \tag #'Modern { d1 e2. } >> f4 g1

but don't find any way to get the E in black.

Thanks for any pointer how to construct this.

Cheers,
Jean-Charles