I don't know the answer to your question, but here is the contact info for the Waltham Cemetery Department:
203 Prospect Street
Waltham, MA 02453
Office hours are Mon-Fri 8:30 AM - 4 PM
They should be able to help you out and if you are looking for someone specific, perhaps look up records for you and maybe even send copies. I have done this with other cemeteries around Massachusetts in the past and have found them willing to do this free of charge.
You could try emailing the archivist at the Waltham Public Library: http://www.waltham.lib.ma.us/localhistory/index.php
to see if they know of any compiled listing of burials there. Good luck.