1.  Robert K. Headley, Jr..  c2003.  Married Well and Often: Marriages of the Northern Neck of Virginia, 1649-1800: Marriages and Marriage references for the Counties of Lancaster, Northumberland, Old Rappahannock, Richmond, and Westmoreland.  Genealogical Publ. Co., Baltimore, MD (online at Ancestry.com):

CORBIN, John & LEE, Lettice; bef. 17 Jul 1744; bride was a dau. of Martha LEE late of the Par. of St. Mary Matfellow alias White Chapel, Middlesex, Eng.; (WC DW 10-36)

2.  Stella Pickett Hardy.  1911.  Colonial Families of the Southern States of America.  T.A. Wright, New York, NY (republished 1958, Southern Book Co., Baltimore, MD; republished 1965, Genealogical Publ. Co., Baltimore, MD).  On p. 180:

HON. JOHN CORBIN, (20--2), of "Port Tobago," Caroline Co., Va., the second son of Hon. Gawin and Jane (Lane-Wilson) Corbin, of "Peckatone," and "Lanesville," b. 1715.  He was educated in England, and took a prominent part in affairs of Church and State; was a Vestryman of Old Stratton Major Parish, and a Burgess; his portrait, by an eminent artist, is still preserved in the family.  He m. his cousin Letitia Lee, dau. of Hon. Richard and Martha (Silk) Lee, of London, England. (See Lee lineage.) Issue: 21--1. Martha, b. 1738 d. 1792, m. Col. John Turberville, of "Hickory Hill," Westmoreland Co., Va., son of Col. George and Martha (Lee) Turberville, of "Hickory Hill," and had issue. (See Turberville and Lee lineage.) 21--2. Jane; line untraced. 21--3. GAWIN; of whom later.

3.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).