I would be very grateful if somebody could help me with the following.

I have a framed original print of a James Thurber Cartoon entitled "The
Thurber Madonna" which was bought by my mother in the late 1930's here in
a Knightsbridge Art Gallery in London, UK as part of a Thurber exhibition.
Amongst other cartoons for sale was "The Last Flower".

If there are any Thurberophiles in this newsgroup, I would be very
grateful if they could tell me (roughly) what it might be worth these days
so that I could put a proper insurance value on it - there is no intention
of selling it.

Any ideas gratefully received.

thespis