What are the correct words to this poem?

[gs6]

As I was going up the stair I met a man who wasn't there, he wasn't there again today I wish that man would go away

[shaneystar2]

Yesterday upon the stair
I met a man who wasn't there.
He wasn't there again today
I wish that man would go away.

William Hughes Mearns

http://en.wikipedia.org/wiki/Hughes_Mearns

[taichiperson]

My last line goes
'how I wish he'd go away'

[Offitt]

I was under the impression the poem was originally

I saw a man upon the stair
A little man who wasn't there
He wasn't there again today
Oh how I wish he'd go away

The whole poem was allegedly changed by a technician at roswel airbase and written on the toilet wall as graffiti

I saw a disc up in the air
A silver disc that wasn't there
It wasn't there again today
Oh how I wish it'd go away