Norman,

Does the marriage certificate for Austin and Elizabeth confirm the appropriate occupation for her father?

Don't know why you call him Augustine when he seems to be called Austin.

Marriages Dec qtr 1859
Edwards Henry Stockport 8a 124
Garbutt Elizabeth Stockport 8a 124
Madden Bridget Stockport 8a 124
Marsden Austin Joseph Stockport 8a 124

1891 Austin Joseph MARSDEN was widower with son Robert age 23 and Daur Margaret age 21.

1881 Austin Joseph MARSDEN is age 44 married with wife Ann Maria age 40 who was born Cheshire Stockport. Son Robert age 13 and Daur Margaret age 11

1871 Austin MARSDEN is Widower age 34 with 6 children born in Stockport. Living in Cheadle Bulkeley

1861 census in Chester
Austin J MARSDEN Head Mar 24 Teacher in Elementary School CHS Stockport
Elizabeth do Wife Mar 27 Dress Maker CHS do
Anne do Daur 3 mo CHS do
Anne PRICE Serv Unm 12 General Serv. Chester

1851 Austin MARSDEN age 14 is living in and born in Cheadle Bulkeley

Is this the future wife of Austin?
1851 census Ho107-2157
Edgeley Road, Cheadle Bulkeley, Stockport.
Robert Garbut Head Mar 50 Bleacher YKS Reeth
Elizabeth do Wife Mar 55 LEI Churley
William do Son Unm 20 Maker up CHS Cheadle Bulkeley
Elizabeth do Daur Unm 18 Hooker at Bleach Works CHS do
Elijah do Son Unm 16 Maker up CHS do

Ancestry has the family indexed as GARBERT in 1841
Ho107-99-9 folio 5
Fletchers Farm, Cheadle Bulkeley
Robert GARBUT 35 Cloth Bleacher N
Elizabeth do 35 N
James do 15 Cloth Bleacher Y
Robert do 13 do Y
William do 11 do Y
Elizabeth do 8 Y
Elijah do 6 Y

Bryan

ps - this may be the marriage from Familysearch so maybe you were right.
Robert GARBUTT Widowed Married Elizabeth GIMSON Single 29 Nov 1835 at St Mary, Stockport, Cheshire. GS film no. 1941830 Digital Folder 004018727.

You could try looking for the birth of Elizabeth GIMSON in LEI.