Seems to me that Verbum and New City Press have a pretty good relationship i.e., the many books in the library published by them. 
The Francis of Assisi: Early Documents Index sometimes known as Volume 4 of the Early Documents appears to be no longer in print and does not even appear available on the New City Press website.
https://www.amazon.com/Francis-Assisi-Early-Documents-Index/dp/1565481712/ref=sr_1_1?crid=1RHK5VQBRK03V&keywords=francis+of+assisi+early+documents+index&qid=1682087811&s=books&sprefix=francis+of+assisi+early+documents+index%2Cstripbooks%2C90&sr=1-1
Verbum does have Francis of Assisi: Early Documents volumes 1-3. Thank you very much for that.
New City Press has published a pdf of the Volume 4 index and provides it to those that sign up for their newsletter. One caveat is that one agrees not to share the pdf with anyone else. Well worth it.
My question/my request...since there appears to be a good relationship with New City Press and New City Press has the Volume 4 index available in pdf format, can Verbum get the index, do their magic, and make it available to those of us that own Volumes 1-3?
Thanks and God Bless,
KSC