Hello crankypants,
The marriage was either and/or very late and/or in another state:
The Argus (Melbourne, Vic. : 1848-1954) - Saturday 30 August 1947 p.11
DEATHS
PEARCE.-On August 10, at Goldmans rd., Smith's Gully, Louisa, wife of the late William A. Pearce, loving mother of Arthur and Ethel (Mrs. Griffiths), grandmother of Wilma, aged 77 years.
1943-1954 Deakin
Regards,
Dave