Maurice Ogden, aren't they a guy? I have to do a biography on him (chose him over a list of hundred year old poets...just because of the Hangman, great poem.) But I can't find any information about him online... When there's no wiki article you know you're in trouble.
I love the last stanza of the poem,
"Beneath the beam that blocked they sky
none before stood as alone as I.
The Hangman then strapped me...with no voice there
to cry 'Stay!'... for me in the empty square."