Hi Cazza
I have found this Charlotte on the 1901 Census, and hope that she is yours.
1901 Census England Oxfordshire Henley
Rg13/1369 Folio 43 Page 4
18 Hart Street
SIMMONS
Wm Anker Head Marr 43 Land Agent & Auctioneer
SLAYMAKER
Hannah C Housekeeper Marr 45 Housekeeper Oxon Henley
William H Husb Marr 40 Carpenter Buckinghamshire Medmenham
Charlotte Dau Unmarr 13 Surrey Ripley
In 1891 William Henry and Hannah C SLAYMAKER are still in Henley on Thames, William is still a carpenter and Hannah is a caretaker of offices. There were no children with them.
A check of FreeBMD shows a marriage for a William Henry SLAYMAKER and
Hannah Charlotte SPARKS in Reading,Berkshire, Dec Quarter 1880 2c 768.
William Henry SLAYMAKER's birthplace on the 1901 is given as Medmenham, Buckinghamshire which is also the birthplace of Charlotte SLAYMAKER senior of the 1891. The birthplace of Hannah SLAYMAKER in 1901 is Henley Oxfordshire, the same as William SLAYMAKER in 1891. Do not know if this means anything useful or is just coincidence.
Cheers
Karenlee