Margaret O'Neil died 21 January 1885, married Dalry 7 June 1850 to James Howard born @ 1823 Ireland. She had four siblings, James born @ 1821 Ireland, John born@ 1828 Ireland, William born @ 1832 Dalry, Elizabeth born @ 1840 Dalry. All of the childrens dates are from the 1841 Dalry census.
I also have a John O'Neil in the 1851 Dalry census age 22 married to Agnes aged 23 staying at 34 new Street Dalry. I have copies of both plus marriage cert.James & margaret 1850. who were my GGgrandparents on my mum's side
If this looks right contact me at firstname.lastname@example.org
I'll be happy to share info & copies of documentation