From ANDERSON, COCKRILL, MOFFETT, SMITH & Allied Families of Northern Virginia -- VOLUME 1: Cockrill Families of Northern Virginia, by James A. Burgess (James A. Burgess, Arizona: 2002), page 2:

Susanna PROU daughter of Cyprian PROU and Margaret VENSANDEN. Walter ANDERSON married Susannah PROU, 16 Dec 1702 in the French Church, New York City, New York. This record is found in the Ancestral File. I have been unable to find an original record to prove that this is true.