I don’t know when or why the marriage of Milford to Stella Burns collapsed. 

But knowing so gave me reason to view the life of Milford Duncan with a certain wariness.  His marriage to Stella was finished by 1919 at the latest. This I know for sure because in early November of 1919 Milford was married for the third time, to Ella Noblett (b. 1881, location unknown). 

Ella Noblett herself had previously been married; she widowed a man named Coates, an Englishman who was closely associated with the rise of Maries Bank. Said to be a shrewd businessman, he also had a hotel operation in Vienna. When he died in 1917 from influenza, he was said to be worth rather a lot of money...

The Story of Milford Duncan...