[Atlases & Maps] [Manuscript maps] Merck, Johann (1619-1669). Coevoorden Manuscript map of the intricate fortifications of Coevorden, 16.5 x 26.8 cm, monogrammed, dated "Mens. Feb. 1648" and numb. LXXVI in pen, on paper w. fools cap watermark, under passepartout. Johann Merck was a German military surveyor who worked in the Netherlands from 1643 to 1649, and he made the preparatory drawings for Theatrum Europaeum and Topographia Germania Inferioris, published by Matthäus and Caspar Merian. Provenance: The original manuscript atlas this leaf was taken from was entitled 'Festina Lente', and it contained 124 fortification plans by Merck. It was unfortunately broken up. See the Beijers book auction, Utrecht, 25-26 March 1981, lot number 1436. The present auction offers a total of 21 plans from that atlas. Cf. P.M. Meurer, Der Geldern-Plan des Johann Merck aus dem Jahre 1646. Ein Schlüsselwerk für eine Neudatierung der Festungspläne Gelderns im 17. Jahrhunderts, in Geldrischer Heimatkalender, 2001, pages 198-207.