Oh. Looks as though Helena married twice and second time after 1913.
Marriage 15742/1930 HARDING JOHN - LADNER HELENA E - BURWOOD
The Sydney Morning Herald - Thu 12 Jan 1911 p.14
PETERSON.-The Funeral of the late Mr. SEREN PETERSON will leave the residence of his daughter, Mrs. Lodner, Madeline-street, Enfield, THIS (Thursday) AFTERNOON, at 1.45 o'clock, for Methodist Cemetery, Rookwood, by road.
WOOD and COMPANY, Funeral Directors, Sydney, Burwood and Suburbs.
Helena Elizabeth Peterson
Spouse's name:Thomas Ladner