You have not flayed any human explorers in Antarctica. Dissected, yes. But not flayed. 

Get the three-panel GM screen, plus the Limited Edition, faux-leatherbound Trail of Cthulhu Second Edition and Limited Edition faux-leatherbound Boundary of the Darkness in glorious hardback, as well as the print version of The Kingsbury Horror, the Syrinscape Trail of Cthulhu audioscape, the GM subscription for The Black Book, the set of four full-colour printed A3 (16.5" x 11.7") maps, a set of game dice (6+GM) in an attractive bag, and PDFs of The Kingsbury Horror, Boundary of the Darkness, and of course Trail of Cthulhu Second Edition, as well as any digital rewards unlocked during the campaign. This pledge does not include shipping, which will be added at the pledge manager stage.

Faux-leather. Totally not human skin.