Dear AJ,
I've run into a something of brick wall searching for William Henry BAILEY's parents.
As you discovered from the registry entry for his marriage at St. George's Parish Church, Deal on Oct 21, 1880, William Henry's father was a waterman by the name of Robert BAILEY.
You also raised the possibility that Robert Mummery BAILEY, Waterman of Chapel Lane, Deal, and his wife Catherine Susanna Elizabeth BAILEY may be William Henry's parents. Evidence consists of the fact that Robert Mummery BAILEY and Catherine Susanna Elizabeth BAILEY had two sons, William Henry, and William James, who were baptised in Deal on 18 March, 1857 and 2 December, 1859 respectively. This fits nicely with William Henry BAILEY's age of 24 and his father's name and occupation recorded in his marriage entry.
However, you dismiss the possibility that this Robert and Catherine were William Henry's parents because their first child "must have died for there to have been a second William and that William is not William Henry."
Normally, I'd agree without hesitation, but there is nothing normal about the BAILEY family! For instance, according to the 1891 Census, William H. BAILEY, age 41, had a younger brother Willie H. BAILEY, age 39 (and a wife Caroline Elizabeth BAILEY, age 40, and sons Wallace James BAILEY, Robert Isaac BAILEY and Willie R. BAILEY) living with him at 10 Market St. Deal on census night. While the birth dates (abt 1850 and abt 1852 versus 1857 and 1859) fit poorly with the William Henry BAILEY and the William James BAILEY who were the sons of Robert Mummery BAILEY, you do have the truly bizarre coincidence that in 1891 my William Henry BAILEY had a brother, two years younger than he, who possessed virtually the same name. In other words, it seems to me that Robert Mummery BAILEY and Catherine Susanna Elizabeth BAILEY had two sons, William and Willie, born two years apart, who both lived to adulthood.
I've looked for supporting evidence for this hypothesis (and for anything on Robert Mummery BAILEY and Catherine Susanna Elizabeth BAILEY generally), but have drawn a blank. It is not that I just cannot find any supporting evidence. The problem is I haven't found anything which disproves my suspicion that Robert Mummery BAILEY is William Henry BAILEY's father either.
Two questions: in light of the above, do you still think that Robert Mummery BAILEY and Catherine Susanna Elizabeth BAILEY can't William Henry BAILEY's parents? And if so, do you have any additional evidence that decides the matter one way or the other?
Once again, my very deepest thanks for all your assistance with my research.
With best wishes,
Jeff