Notable collections Nicholas Scull II

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^ 1753 map of philadelphia, nicholas scull , george heap, first edition . maps. west philadelphia community history center. retrieved 1 january 2014. 
^ honourable thomas penn , richard penn, esqrs., true & absolute proprietaries & governours of province of pennsylvania & counties of new-castle, kent & sussex on delaware map of improved part of province of pennsylvania . map. library of congress. retrieved 1 january 2014. 






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