Cleland's notes do not contain anything on the case. Maciej Henneberg, professor of anatomy at the University of Adelaide, examined images of the Somerton man's ears and found that his cymba (upper ear hollow) is larger than his cavum (lower ear hollow), a feature possessed by only 1–2% of the Caucasian population. In May 2009, Abbott consulted with dental experts who concluded that the Somerton Man had hypodontia (a rare genetic disorder) of both lateral incisors, a feature present in only 2% of the general population. In June 2010, Abbott obtained a photograph of Jessica Thomson's eldest son Robin, which clearly showed that he – like the unknown man – had not only a larger cymba than cavum but also hypodontia. The chance that this was a coincidence has been estimated as between one in 10,000,000 and one in 20,000,000. The media have suggested that Robin Thomson, who was 16 months old in 1948 and died in 2009, may have been a child of either Alf Boxall or the Somerton Man and passed off as Prosper Thomson's son. DNA testing would confirm or eliminate this speculation. Abbott believes an exhumation and an autosomal DNA test could link the Somerton man to a shortlist of surnames which, along with existing clues to the man's identity, would be the "final piece of the puzzle". However, in October 2011, Attorney General John Rau refused permission to exhume the body, stating: "There needs to be public interest reasons that go well beyond public curiosity or broad scientific interest." Feltus said he was still contacted by people in Europe who believed the man was a missing relative but did not believe an exhumation and finding the man's family grouping would provide answers to relatives, as "during that period so many war criminals changed their names and came to different countries". In July 2013, Abbott released an artistic impression he commissioned of the Somerton man, believing this might finally lead to an identification. "All this time we've been publishing the autopsy photo, and it's hard to tell what something looks like from that", Abbott said. After initially contacting her to seek her DNA, Abbott married Rachel, the daughter of Roma Egan and Robin Thomson, in 2010, and they have three children. In December 2017, Abbott announced three "excellent" hairs "at the right development stage for extracting DNA" had been found on the plaster cast of the