I'll have another trawl through the GRO for Albert!
So, I had another look at the GRO, using a fuzzy search for males surname LAW or similar with mmn JACKSON or similar anywhere in England/Wales and came up with nothing in Doncaster or Sheffield and no Alberts anywhere.
There is always the possibility that as Albert (according to the censuses) was born c1876 and as the LAW/JACKSON marriage in Sheffield (which according to the details JJen found looks right) was in Jun-Sep, the bride and groom ran off to marry before the baby was born and never got round to registering the birth.
Logically, the next step is to hunt church records to see if there is a baptism record for Albert.
Philip