Descendants will bury his remains in private, but appealed for the skull that was stolen from an Old Melbourne Gaol display case in 1978.
"That got me thinking, so I contacted my friend in Melbourne and next thing you know I have three pages of media people to call back," said Ms Hoffman.
"It's mainly by the news media in Australia, they wanted to fly me over to bring it back for it to be tested," Ms Hoffman said.
She turned down the offer to watch her grandson play rugby, but was looking for a New Zealand expert to help solve the mystery.
"I'm going to see an archeologist and get a few clues about it and then I would give it back to the family, but no one else. I am just going to keep him safe until I find out anything more. He sits on the piano, but I might have to hide him after this."
Ms Hoffman has hundreds of skulls, but only two human ones, including Ned.