Moses invents the roman numerals

Joking aside, visitors to Manly will recognise this tribute to the Ukranian immigrant John Suchomlin who arrived in Australia in 1911 and from the mid-20s began sculpting in sand on Manly beach. Many of his works are depicted in postcards from that era.
His name is uncommon so a search will easily find material on his extraordinary life such as these: Wishing Well Shelter and Sandman.