I got to revise what I said above about the two sellers of alleged original Winnie the Pooh drawings by EH Shepard:
I don't think they were "fake" drawings, in the sense that someone made drawings copying Shepard with the intention of palming them off as originals. Rather, I suspect they were not original drawings at all, but rather prints of drawings. (And the two sellers may have been honestly mistaken, though perhaps careless, in thinking the thing was a drawing rather than a print.) This is because I've come to notice several old prints of Pooh drawings, such as this one (honestly labelled a print--although could the seller possibly take a blurrier picture):
http://cgi.ebay.com/PENCIL-DRAWING-OF-WINNIE-PIGLET-ART...QQrdZ1QQcmdZViewItem
It does seem possible an old but high-quality print could be mistaken for a drawing, though I'm no expert in such things either.