Propped on a stick he viewed the August weald;
Squat orchard trees and oasts with painted cowls;
A homely, tangled hedge, a corn-stalked field,
And sound of barking dogs and farmyard fowls.
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My interpretation of the last line is: - the one legged man is glad to be enjoying the life he had imagined and is pleased that he has an outward symbol of his service and sacrifice.
Sassoon must have rolled in his grave when this comment was posted. I don't think I've ever seen a point missed harder.