and did he marry poor blind Nell?, phr. — Green’s Dictionary of Slang

and did he marry poor blind Nell? phr.

[play on the clichéd conventions of popular fiction; allegedly from a late-19C ballad]

a phr. used to imply one’s disbelief in the previous statement.

1944		‘F. Bruno’ Desert Daze 23: And did he marry poor blind Nell? He did — pig’s Christmas parcel [DNZE].
1945		‘Poor Blind Nell’ in Mess Songs & Rhymes of the RAAF 47: And did he marry poor blind Nell? / He did – Pig’s Fucking Arsehole.
1984		Partridge DSUE (8th edn) 19/1: since ca. 1910.