De La Mare, Austin Dobson confusion.

Just a query on something that''s been bemusing me for a while:

Walter De La Mare's poem 'Fare Well', coupled with his 'The Spark', had a profound effect on me as a schoolboy and I don't think it's too strong to say that they've shaped the way I've viewed the world in my adult life; so I know them quite well.

So, since I've discovered the 'joys' of the internet, I've been mildly intrigued as to why 'Fare Well' is all over the web as having been written by Henry Austin Dobson (try running a search on 'Look thy last on all things lovely'). Does anyone have any information on this? Is there any sort of interesting story behind it?

It's not an interesting story but, the only thing I can think is that there's some confusion with Austin Dobson's poem "Farewell, Renown", which starts

Farewell, Renown! Too fleeting flower,
That grows a year to last an hour -- ...

Yes.

I suppose someone made one mistake once and it's somehow got multiplied.

There's probably some sort of moral there for the internet age ...