Just come across this in "Companion into Gloucestershire" - R.P. Beckinsale (1947 5th edition Methuen), it's a quote from a poem called "Gloucestershire Men" by F.W. Harvey (can't find the whole text):
"The men in yonder humped-up barrow
Crouched with their mortal joys and sorrow;
The Roman soldiers sound asleep
By walls where English weeds slow creep
(A thousand years are but a span ...)
Each dead man was a Gloucestershire Man!"