As you are tracing your family history, The Nottinghamshire Family History Society are in the process of recording the inscriptions of the Rock Cemetery.
As a member of the society, I have just finished checking some of the inscriptions, but I am not sure how many they have actually recorded.
If you want more information it may be an idea to contact them. They do have a web sit with details of who need to contact.
Byeee
mrsb