Looking for Primary Sources on Mary Eliza Mahoney, First Black Nurse in the U.S.

I see that she gave the opening speech at the first convention of the National Association of Colored Graduate Nurses, but it looks like the records from the organization are all at NYPL and have not been digitized and put online at this time. I am a librarian and usually pretty good at finding these kinds of things, but I'm coming up empty and would love to be able to help this student. Thanks in advance for any leads you may have!