WARNING:  The Edward who married Mary and had these children may not be the son of Edward & Jane (WILKINSON) CORBIN; he could be the son of Edward's brother, Nicholas CORBIN, Jr.

1.  Baltimore County, Maryland.  Will of Edward Corbin, 1770.  Maryland State Archives: CR72241-1, Liber 3, Folio 144 (as transcribed by Cheryl Kemp Perkins, online in the Archives of the Baltimore County MDGenWeb site).  Summary (by DGM): 

Testator:  Edward CORBIN, Sr., of Baltimore Co., MD Legatees—     Wife:  Mary     Children:  John, Edward, Eliakim, Rachel, Leah, and Mary Date Signed:  14 Jul 1770; Date Proved:  30 Nov 1770 Witnesses:  Thos. HALE; George HARRYMAN, Jr.; Joseph SYARS

George HARRYMAN is Edward's first cousin; Joseph SYARS/SIAS is the brother-in-law of Edward's nephew, Benjamin CORBIN. 

2.  Robert W. Barnes.  1989.  Baltimore County Families, 1659-1759.  Genealogical Publ. Co., Baltimore, MD (Broderbund CD-195):

p. 134

CORBIN, EDWARD (3), s. of Nicholas (1), was first listed as a taxable in 1701, placing his birth date as c. 1685; alive in 1750; m. Jane, dau. of William Wilkinson some time prior to 1716; Sept. 1716 Edward Corbin and w. Jane sold John Bowen pt. of Corcell Hill and on the same day John and Mary Bowen sold Corbin pt. of Jones' (or Jonas') Range; in March 1722 Edward and Jane conv. widow Tamer Wilkinson 425 a. Land Is All and 50 a. Wilkinson's Spring; in Sept. 1737 they sold Thomas Sligh pt Corbin's Rest, which Edward said he had inher. from his father; in 1750 owned 100 a. Cumberland; in May 1758 Edward and Jane conv. land to Robert Wilkinson previously conv. to his mother in March 1722 (this was done to clear up any question of title); had iss.:  NICHOLAS (named in the will of John Barrett in June 1717); poss. EDWARD; poss. WILLIAM WILKINSON; ABRAHAM, b. 7 Sept. 1722; PHYLIS-ANNA, b. 12 May 1725; PROVIDENCE, b. 26 June 1727; UNITY, b. 2 March 1730... CORBIN, EDWARD (4), s. of Edward (3) and Jane, may be the Edward who d. leaving a will, 14 July 1770 - 30 Nov. 1770, naming a w. Mary and six ch.: EDWARD, b. 11 April 1746; ELIAKIM; MARY; JOHN; RACHEL; and LEAH...

It's unclear to me why Barnes says, "poss. EDWARD," in the entry for his father, then names him as Edward's son in his own entry.  I'm assuming the Edward who died in 1770 is the son, either of Edward or Nicholas, but that may not be correct.

3.  Richard B. Miller.  1985.  "Index to the Signers of the 1768 Joppa Petitions of Baltimore County, Maryland."  Maryland Genealogical Society Bulletin 26(4): 393-428 (Broderbund CD-208).

p. 393

By 1768 it had become apparent that the once thriving port of Joppa on the Gunpowder River was no longer capable of handling the commercial shipping for which the port facilities of the rapidly growing port of Baltimore Town on the Patapsco River were needed.  Largely as a result of this shift, it was obvious to most people that Baltimore was a far more appropriate seat for the county government.  The Assembly, however, with great fairness, chose to make this determination on the basis of a popular referendum, and ordered that petitions, both pro and con the change, be circulated throughout the county to be signed by all adult males over 18 -- virtually a census of adult county residents in 1768...

p. 399

Corbin, Edward, 533 Corbin, Edward, Juner, 539

Page numbers after individual's names are those of Appendix VII, Vol. LXI, Archives of Maryland, from which Miller compiled this alphabetical index.  Those opposing the petition have the page number underlined.

4.  Broderbund.  World Family Trees.  Vol. 40, Pedigree No. 356.

5.  LDS.  Family Search: Internet Genealogy Service:  AF - Ancestral File (online at FamilySearch.org).