All will be revealed: secret postcards at the Royal College of Art

More than 2,000 pocket-size works of art have been donated by more than 800 artists for this year's Secret Postcards exhibition in London. The cards will be auctioned for charity Photograph: David Levene/Guardian

Paul Smith is so last year ... Secret Postcard 516 Photograph: PR

Barbie meets Howard Hodgkin (now there's a thought). Secret Postcard 2338 Photograph: PR

A hint of the Hockneys? Secret Postcard 5 Photograph: PR

When Curtains Go Bad. Secret Postcard 1024 Photograph: PR

So Jamie Reid's retired ...? Secret Postcard 2077 Photograph: PR

Clue: attended Hornsey College of Art. Secret Postcard 1778 Photograph: PR

Sorry, Steve Bell's job is already taken ... Secret Postcard 2165 Photograph: PR

... as is Peter Doig's. Secret Postcard 2322 Photograph: PR

Paula Rego? (Though we're not too impressed by that brushwork.) Secret Postcard 479 Photograph: PR

A reference to the Guardian's 2008 ad campaign, surely? Secret Postcard 9 Photograph: PR

Paolozzi meets Terry Gilliam meets Mark Leckey (squint and you can see the Mickey Mouse). Secret Postcard 63 Photograph: PR

Whoever it's by, this one is deeply disturbing ... Secret Postcard 422 Photograph: PR

The skeletal dog has more than a touch of the Damien Hirsts. Secret Postcard 395 Photograph: PR

Someone who's been struggling at auction (though secretly we suspect it's by David Shrigley). Secret Postcard 2405 Photograph: PR

Primary colours and a hint of Malevich? Secret Postcard 2065 Photograph: PR

With thanks to LS Lowry or Alfred Wallis ... Secret Postcard 1643 Photograph: PR

Either a complicated yoga pose or something far naughtier ... Secret Postcard 76 Photograph: PR

Hommage à Picasso? (He's dead, so we're reasonably sure he's not taking part.) Secret Postcard 258 Photograph: PR

Halloween happened already, surely ...? (And we're not sure what that lump of speckled stuff is, but we don't like it one bit.) Secret Postcard 1278 Photograph: PR

Anselm Kiefer, eat your heart out ... Secret Postcard 1347 Photograph: PR

Decisions, decisions ... The sale happens on 21 November Photograph: David Levene/Guardian