After several blog posts about multi-coloured elephants, I give you by way of a change --- a purple cow walking through a plate-glass window to advertise the amusements and entertainments on offer at London's South Bank 'fringe' event,
Udderbelly...

It was, as you can see, a shattering experience even to someone familiar with the various alarms and diversions commonly met with on South Bank.
Naturally - or, perhaps,
unnaturally - this biliously-hued bovine brought to mind the famous verse written by American poet, artist and critic
(right) Gelett Burgess.
Published on 1 May, 1895, in the first issue of the monthly magazine,
The Lark...
...it was entitled
'The Purple Cow: Reflections on a Mythic Beast Who's Quite Remarkable, at Least.'The poem almost immediately passed into public consciousness, so that, two years later, in the April 1897 edition of
The Lark, Burgess published
'Confession: and a Portrait Too, Upon a Background that I Rue':Ah, yes, I wrote the "Purple Cow"—
I'm Sorry, now, I wrote it;
But I can tell you Anyhow
I'll Kill you if you Quote it!
Since impersonation is - or so they say - the sincerest form of flattery, it is a testament to the popularity of Burgess's short, but witty, ditty that it has been so frequently parodied.
Of the many purple cow pastiches, these are a couple of my favourites:
I've never seen a purple cow
My eyes with tears are full
I've never seen a purple cow
And I'm a purple bull.
I've never seen a purple cow.
I never hope to see one.
But from the milk we're getting now,
There certainly must be one!
Even
Ogden Nash, the twentieth century's greatest writer of light verse (a sweeping statement there, based on personal prejudice!) paid tribute to Gelett Burgess and his purple cow with this little ode:
I've never seen an abominable snowman,
I'm hoping not to see one,
I'm also hoping, if I do,
That it will be a wee one.
While another well-known versifier,
Carolyn Wells, parodied the Purple Cow in the style of
Milton, Shelley, Tennyson, Wordsworth, Keats and others.
The Purple Cow has also inspired a drink (vodka and grape juice), an ice-cream (raspberry with chocolate and white chocolate chips), a grape-flavoured taffy lollipop and a chain of burger restaurants in the Southern USA. What's more, a purple cow (named, incidentally, Ephelia) happens to be the mascot of Williams College, Williamstown, Massachusetts.