Hi Danielle Monk,
Do you have their marriage certificate, dated 4 June 1879?
If not, here it is:
Name: Polden, Emily Ann
Record Type: Marriages
Age: 19
Spouse: Russell, John
Age: 21
Date of marriage: 04 Jun 1879
Registered: Ulverstone
https://stors.tas.gov.au/RGD37-1-38p203j2kAND, the birth of Emily Ann POLDEN in 1859:
Name: Polden, Emily Ann
Record Type: Births
Gender: Female
Father: Polden, Thomas
Mother: Riggs, Mary
Date of birth: 05 Aug 1859
Registered: Deloraine
https://stors.tas.gov.au/RGD33-1-37p409j2kMary