StaffordshireBDM has the following interesting 2 entries
Staffordshire Marriage indexes for the years: 1863
ASHLEY Joshua BARLOW Anne W Bradeley, All Saints and St Mary Stafford CE3/1/104
ASHLEY Joshua SABEN Anne W Bradeley, All Saints and St Mary Stafford CE3/1/104
http://www.staffordshirebmd.org.uk/So we have Joshua Ashley marrying Anne Barlow and Anne Saben with the same reference number?? The two names seem very different to be a transcription error, so it may be that Anne Barlow was also known as Anne Saben? This certificate may take you back a little further.
Edited later -

I'm sometimes a little slow - given Anne's age on the 1881 Census she was probably a widow when she married Joshua. Anne Saben was probably her married name. Interesting that both names are on the certificate. I have been married twice and my maiden name is not on my 2nd marriage certificate.
You may be able to find some 1/2 siblings for Edward Barlow Ashley.
The same site gives a birth for Joshua Ashley in 1843 at Newcastle under Lyme. Whether this is yours?
I couldn't find the birth of Edward Barlow Ashley, but the UKBDM sites seem to be regularily updated, so worth returning to in the future.
I did find this on the 1881 Census, Age is about right for Edward B - slightly out for Joshua (if the same as the above birth - but given the age difference between Joshua and Anne, adding a few years is possible).
Household:
Name Relation Marital Status Gender Age Birthplace Occupation Disability
Joshua ASHLEY Head M Male 40 Standon, Stafford, England Farmer 147 Acres Employing 2 Men
Anne W. ASHLEY Wife M Female 60 Bradley, Stafford, England
Edward B. ASHLEY Son U Male 16 Bradley, Stafford, England Farmers Son
Aron TILL Serv U Male 20 Bradley, Stafford, England Farm Serv (Indoor)
Elizabeth FENYHOUSE Serv U Female 17 Haughton, Stafford, England General Serv
Source Information:
Dwelling Dernsdale
Census Place Bradley, Stafford, England
Family History Library Film 1341644
Public Records Office Reference RG11
Piece / Folio 2687 / 5
Page Number 3
Anne appears to be 20 years older than Joshua - she would have been 44 when her son was born which is possible.
If Anne's age is correct this appears to be her birth from the IGI
ANN WOOD BARLOW
Christening: 12 APR 1820 Bradley By Stafford, Stafford, England
Father: EDWARD BARLOW Family
Mother: MARY
batch C037753 1813 - 1848 film 0426495
and if you look at the batch you will find 3 siblings.
You will need to decide if any of these are your family
Trish