Give them a call and google them there is a lot on their website   Rosehill Cemetery 5800 North Ravenswood Avenue, Chicago, IL 60660 | 773-561-5940         They are nice people to deal with.  I had contact with them years ago looking for my "baby uncle" they did a search nothing could be found.   If you do inquiry by mail I would suggest a donation and a self stamped envelope you will get a faster reply.   Good hunting. Diane