Hello everyone!
After some time, I've come back to explore what I can about the Vickresses.
I decided to explore a branch a bit further, and this is what I've come up with, but if anyone can confirm this information or expand it if there are any missing persons, I'd be very thankful.
Henry Edward Vickress, son of William and Elizabeth, brother of my great-great-great-grandfather Frederick, was born in 1830 in Hope under Dinmore, Hereford. He had a twin sister, Diana, who seems to have died in 1851.
Henry married in Birmingham in 1854 Mary Davies. I think they had two children:
Caroline Ann, b.Mar 1855
Mary Ann, b.Jun 1857.
The family seems to have moved, or otherwise was registered in, Wolverhampton/Staffordshire.
Mary Vickress née Davies died in Sep 1857, so shortly after the daughter was born.
In Dec 1859 Henry remarried to Sarah Foizey. In Jun 1862 his youngest daughter from his first marriage died, and in Sep 1862 another daughter, christened Mary Ann, was born and given the deceased sister's name. She died in Jun 1863.
Around the time of the death, another sister was born, Mercy (b. Jun 1863) who is listed in the 1881 census with her mother. I know she died single in Jan 1886 after giving birth to an illegitimate son called Arthur, who died shortly after.
Henry Edward and Sarah had at least three more children: Jane (b.Sep 1867, d.Mar 1872), William Henry (b.Mar 1869, d.Mar 1872) and Drusilla (b.Mar 1873, d. Sep 1873).
In 1875 Henry Edward died aged 44-45. His widow died in 1881 shortly after the census was taken. His youngest surviving daughter Mercy died in 1886, and his oldest daughter from the first marriage died in 1891 in Kings Norton, Warwickshire. So by 1891 Henry Edward's family (himself, two wives and at least seven children) had passed away. as far as I can see, there are no descendants.
I'd like to know if the 1861 or 1871 census give any more information, whether it mentions any other children. Sometimes the surname is confused with Vickers (for instance on the BMD Index).
Thank you!