I'm a Briggs from Isle of Wight and surrounding areas.I have much info for you if you will e-mail me.
Also, I have a William Browne who died abt 1722.His daughter Mary married Walter Flood of Surry Co., VA.Flood family ties in with Briggs family. Also Blunt family.
Your Richard Briggs may be Richard Washington, son of Mary Flood and John Washington and stepson to Henry Briggs.
. MARY FLOOD (COL. JOHN (FLUDD), SIR NICHOLAS5 FLUDD, SIR THOMAS, JOHN, DAVID, RHIRID VLAIDD LORD OF PENLLYN) was born Abt. 1635 in Surry Co., VA, and died Abt. July 5, 1681 in Surry Co., VA. She married (1) RICHARD BLUNT Abt. 1655 in Surry Co., VA. He was born Unknown, and died Abt. 1656 in Surry Co., VA. She married (2) CHARLES FORD Abt. 1657 in Surry Co., VA. He was born Unknown, and died Unknown. She married (3) JOHN WASHINGTON November 15, 1658 in Surry Co., VA, son of RICHARD WASHINGTON and DAME CURTIS. He was born Unknown, and died Unknown. She married (4) HENRY BRIGGS Abt. 1661 in Surry Co., VA, son of HENRY BRIGGS. He was born Abt. 1635 in Southwark Parish', Surry, 'Virginia, and died Bef. July 6, 1686 in Surry Co., VA.