I am sorry that I am not able to reply in Latin!
What I described for speed as an epitaph is actually the dedicatory text of a memorial window. Since posting my question, I have actually come across the text on the internet. (Google: “Read the ebook Horace in quantity, et caetera by Horace”).
It appears that book was
0. A. S.”
O.A.S would no doubt be Oswald August Smith, who founded the building (St. Stephens, Hammerwood), placed a couple of memorial windows in it, and is commemorated there himself.
Below, I cut-and-paste from that electronic source without correcting. Perhaps the private printing budget didn’t run to proof-reading, but I suppose it is much more likely that the mis-spellings arose in the process of getting the book into electronic form. The window itself does not have them.
“For a Window in Memory of H.M.S., in St. Stephen's
Church, Hammerwood, Sussex, 1894.
Nunquam non memores Parentis almas,
Fecundpe, tenerse, piee, fidelis,
Illi banc ponimus, et Deo, fenestram,
Nos centum in numero undecimque supra,
Nati, et cum pronepotibus nepotes,
Quos defuncta snperstites reliquit. ”