Mr Hellings said the Historic Places Trust prefers such finds to remain in their original site.
Meanwhile at Christchurch Boys', graffiti dating back to the 1930s has been found during the deconstruction of the old "Radio Shack" building, the Press reports
The building, built in 1874, has sustained extensive damage in the quakes and is being deconstructed in order to preserve its heritage features.
Deconstruction workers have found the names of former students within the inner linings of the walls.
The school's principal Trevor McIntyre told The Press the school will go though lists of former students to track where the names on the wall are now.
- Newstalk ZB / NZ Herald Online