"Sauniere had created a life-size replica of Leonardo Do Vinci's most famous sketch.... Vitruvian man... a perfect circle in which was inscribed a nude male... his arms and legs outstretched in a naked spread eagle."
No, Vitrivian Man doesn't show a spreadeagle, or at least not only a spreadeagle. VM has two of every limb, and thus shows a man in sixteen different possible positions.
Sauniere hadn't replicated it, and couldn't. If you piled two renowned creators in a stack you could just about do it (though even then I think you'd have difficulty maintaining the side-facing foot position required) but with one Sauniere you have as much ambiguity as with the anagrams; sixteen possible positions would all qualify. I personally see the renowned curator in the left-leg-straight right-leg-45-degrees right-arm-straight left-arm-45-degrees pose. Very Monty Python.
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