Stillwell, Historical and Genealogical Miscellany, New York and New Jersey, 1930.
18 March 1675, "John Bowne, of Middleton, demanded for his rights, 500 acres given by the Lords Proprietors, as being of the first purchasers. Item - for the rights of himself and his wife, his father and mother, and for William Compton and his wife, from the first year, each, 120 acres, is 720 acres, for 3 servants, each 60 acres - 180 acres". (This, I beleive, is why the above authorities conclude that William Compton and his wife were not servants, but that she was a daughter of William Bowne, as she and William Compton were worth the same as John Bowne and his parents - 120 acres each. Whereas, the 3 servants were worth only 60 acres each).
I know that these are not primary documentation, such as a marriage licsence or a contempory family bible, but the subject has been thoughly researched, and some, what I beleive to be, reliable sources, have come to the conclusion that William Compton's wife was Mary Bowne, daughter of William Bowne. If you have another conclusion, I would be very happy to hear it. We are all, I hope, seeking the absolute truth, if possible, and would like to prove things with primary documentation, but that is not always possible. A preponderance of the evidence and a studied educated guess are acceptable if accompanied with an explanation of how that conclusion was arrived at.