The author describes the work carried on in his organization's laboratories to determine the authenticity of the <i>Vinland Map</i>, the property of Harvard University. The map had been bound between * 2Tartar Relations*1 and <i>speculeum historiale</i>, both of which were used to give values for the levels of pigment on documents of the * 2Vinland Map's*1 supposed period of production. Tests were carried out using x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electron microprobe analysis, and polarized light microscopy. The tests showed the presence of titanium dioxide, in a granular anatase form similar to today's TiO₂ pigment, and at a level two orders of magnitude greater than that found in the other two documents. Since anatase is produced by calcination at 800-1000°C, a temperature range not achievable in the 15th century, the authenticity of the map is questionable. Tests of the ink's diffusion stain showed it to be a pigmented yellow material, unlike a normal aged ink stain, thus creating further doubt of the document's veracity. From this evidence the author concludes the <i>Vinland Map</i> is of 20th-century manufacture. -- AATA