Important early separately issued chart of the Western Atlantic and contiguous parts of the Northeastern US and Northern South America. At the time, the only similar charts were the Blaeu Pasckaet referenced below and the Portugeses and Spanish portolano maps of the period.
Theunisz chart was published in response to the commercial success of Blau's West Indischen Pasckaert, as a means of offering the same map in sheets, which could also be bound into an atlas.Theunisz map was the progenitor of an entire series of maps which covered the same region, including Colom (1656), Doncker( 1659), Van Loon (1661), Colom (1663), Goos (1666), Doncker (1672), De Wit (1675), Robihn (1683) and Loots (1707).
An exceptional example, from an early Composite atlas.