Virgo triumphans, or, Virginia richly and truly valued, more especially the south part thereof : viz. the fertile Carolana, and no lesse excellent isle of Roanoak, of latitude from 31 to 37 degr. relating the meanes of raising infinite profits to the adventurers and planters : humbly presented as the auspice of a beginning yeare, to the Parliament of England and councell of state / by Edward Williams, gent