This 1881 census for Brighton is my starting point (RG11/1091/33/14) summary below and the one and only census time I can find Cora (mistranscribed as Lora on one site).
1881 1 Poplar Passage, Brighton
Edward Hornsby M Hd 33 Sussex - Brighton
Corah (Lorah) " M Wf 31 Sutton
Albert " Son 6 London
George " Son 5 London
Margaret " Dau 4 Sussex - Brighton
Florance " Dau 2 Sussex - Brighton
Magdalen " Dau 3mo Sussex - Brighton
This is the only time I have tabs on either Albert or George - not even birth registrations.
Not sure what happened to Florance but Margaret & Magdalen are in a Catholic Orphanage in Brighton in 1891 (RG12/803/76/13) although Margaret is Hornsby and Magdalen is Hanbury. This surname is subject to many variations and can be Hornsbury, Hornberry, Hornby and Hornsby to name a few (oh and Hanbury as above).
I find Margaret once again in 1911 in Surrey and Magdalen all through the censuses and the 1939 register until her death in 1957 in Chelsea, London.
Assuming the reason for the orphanage was parental death I then discovered the death of a Cora Susannah Hornsbury in Q4 1887 Brighton, age at death given as 39 thus an estimated birth year of 1848.
An online tree has Cora Susanna's maiden name as Donnelly but I can't find anything that would substantiate this - I can't find any Hornsbury/Donnelly marriages.
The only Cora Susanna marriage I can find is Q3 1874 in Marylebone of a Cora Susannah Evstaphieve to a Robert Jeans Rose but as I can't find this couple in 1881 it's conceivable I suppose that she left him and teamed up with Edward Hornsbury. Needless to say I can't find a birth for a Cora Susanna Evstaphieve anywhere.
I haven't found Edward in any census after 1881 either, so possibly he has died but haven't spotted a suitable registration or maybe he is with sons Albert & George & maybe Florance? hiding somewhere under a mistranscription.
Is any super sleuth able to find anything about any of the above other than Magdalen please?
Thanks, Pheno