St Mary's Church, Yate (Bristow Gravestone)

So far as it is possible to tell, this Inscription reads:

In Memory of / Mary / Daughter of /
William and Mary / BRISTOW /
of the Parifh of ? [can't even hazard a guess]
who died June the 15. 1791
Aged 13 Years
in thy quick Death conclude we must
thir?st Flow'rs are gatherd first
?? She is gone her fame is left behind
?? is that live her Life & Death to mind.
[Ed: parish might be Codrington?]

(Transcription provided by Alf Beard)