A letter from William Penn, proprietary and governour of Pennsylvania in America, to the Committee of the Free Society of Traders of that province, residing in London : containing a general description of the said province, its soil, air, water, seasons, and produce ... of the natives or aborigines, their language, customs, and manners ... of the first planters, the Dutch &c. ... as also an account of the city of Philadelphia ... with a portraiture or plat-form thereof ...