The straggled soldier halted – stared at Him-
Then clumsily dumped down upon his knees,
Gasping, ‘O blessed crucifix, I’m beat!’

You can see the complete handwritten version of this poem in one of Sassoon’s notebooks on the University of Cambridge’s Digital Library website. Sassoon considered this poem to be a failure and it was never published during his lifetime. A note enclosed in his notebook explains why http://cudl.lib.cam.ac.uk/view/MS-ADD-09852-00006-00002/192