Re: Robert (Bruce?) Polk/Polke/Pollock & Magdalen (Tasker) Porter Polk

'Seventeenth Century Colonial Ancestors' lists the following:

"Polk, Robert Bruce (1640-1703/04) Md.; m. Magdeline (Tasker) Porter.Landowner; Military service."

Source: Mary Louise Marhsall Hutton, 'Seventeenth Century Colonial Ancestors of Members of the National Society Colonial Dames XVII Century 1915-1975 (Baltimore: Genealogical Publishing Co., Inc., 1987) p. 201

I seek information concerning the immediate antecedents of Robert Bruce Polk and his spouse Magdeline Tasker, as well as any known issue of Polk and Tasker.