|Mentioned||Murdoch in Toyland|
|Relationships||Stella Smart (wife)|
Arthur was in love with the theatre owner's wife, Stella Smart. After Stella killed her husband for having an affair with Ellen Granger, Wellesley helped her cover up the murder by strangling Edward Green, a poor actor who resembled Virgil Smart.
Later, Wellesley married Stella Smart. He was arrested in 1895 by Detective William Murdoch for the murder of Eddie Green and his complicity in the murder of Virgil Smart.
In Murdoch in Toyland it is revealed that he was hanged.