In the early 2000s, esteemed Australian archaeologist Matthew Spriggs made a promise to the community of Aneityum, an island of Vanuatu: he would try to recover their lost numbering system, erased by English missionaries in the mid-1800s. He has now found it, and is returning the knowledge to the community.

• Guest: Matthew Spriggs, Emeritus Professor of Archaeology at The Australian National University (ANU).  Fellow of the Australian Academy of the Humanities. Honorary Curator of Archaeology at the National Museum of Vanuatu, and Honorary Librarian of the Vanuatu and Pacific Collections at the National Library of Vanuatu.  
• Producer: Ann Arnold