The only record I have in my database that is even close is from the nearby Crewkerne parish records which record:
Emanuel baptism 8 Jan 1837, son of William and Anne Slade
Perhaps this is a relation?
Also, I did photograph some Slade gravestones when I was in the churchyard in North Perrott and found one with the following inscription:
"In loving memory of Frances Charles, fourth son of Emanuel Slade who died Mar 17, 1876, aged 9 years.
Also of Sarah Jane, wife of the above named Emanuel Slade who died Mar 18, 1878 aged 51 years.
Also of the above Emanuel Slade who died July 17, 1896 aged 71 years."
If this is your family let me know and I will scan a copy of the gravestone and email it to you.