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Manuscripts. Facsimiles.. German, *##G 35.38 August, der Jungere, Herzog zu Braunschweig und Luneburg, 1579-1666.
Photographic fac-similes of three letters pre- served in the Ducal library at Wolfenbuttel deted...1620, to a friend in Augsburg, contain- ing instructions for Lucas and Wolfgang Kilian, the engravers of the illustrations and title- page of his Cryptomenytice et cryptographia printed at Limeburg in 1624 [on shelf-no. #6111.58] These letters are evidence that the figure on the
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