William Turner, Odysseus Mocking Polyphemus, 1829 National Gallery Exhibition *Immediate purchase is OK, but please check the profile. This is a merchandise item purchased at the National Gallery Exhibition in London several years ago. It has been stored in a card case, so there are no scratches or folds. However, the edges on the back are slightly yellowed. It is unclear if this is due to age or the original paper quality, but it is only noticeable upon close inspection and with specific lighting. I am also selling other art postcards. Please check the profile before commenting or purchasing.