1.  Marriage Record:

2.  1830 Census Index/Images (online at Ancestry.com; Image #25 of 94 — mis-indexed "Corbirs"; list was roughly alphabetized; extracted by Diana Gale Matthiesen):¤

1830

KY

Nicholas Co.

Roll M19_40

p. 190

Ln. 5

Joshua Corbin

100 001 - 000 110 010

100100-000010

These data indicate:

No., Race, Gender	Age Class	Therefore Born	Individuals Inferred
1 white male	4 or under	1825-1830	= Abram
1 white male	30-39	1790-1800	= Joshua (b. 1800)
1 white female	15-19	1810-1815	= ?
1 white female	20-29	1800-1810	= Rachel (b. 1806)
1 white female	50-59	1770-1780	= mother?
1 male slave	9 or under	1820-1830	= ?
1 male slave	36-54	1775-1794	= ?
1 female slave	55-99	1730-1775	= ?

Rachel's mother died in 1810, so the older woman may be Joshua's mother.

3.  1840

4.  1850 Census Index/Images (online at Ancestry.com; Image #4 of 62):  District No. 2, Bourbon Co., KY, p. 236B, 180/180, enumerated 20 Aug 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

Joshua Corbin	49	M		Farmer		Kentucky
Rachel    "	44	F				"
Benedic   "	19	M		"		"
Nathan    "	17	M		"		"
Sarah     "	15	F				"
Martha    "	9	F				"
Joshua    "	2	M				"
Ellen     "	4/12	F				"

5.  1860 Census Every-Name-Index/Images (online at Ancestry.com, Image #57 of 206):  Morelands P.O., District No. 1, Bourbon Co., KY, Roll M653_356, p. 539, PN 57, 387/403, enumerated 1 Aug 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

Joshua Corbin	60	M		Farmer	12000	1000	Ky
Rachel   "	53	F					"
Ben B    "	20	M		Farmer			"
Sarah	21	F					"
Martha	18	F					"
Joshua M	12	M					"

Ben is 29, not 20; and Sarah is 25, not 21.

6.  1870

7.  1880

8.  1890

9.  William Henry Perrin, ed.  1882.  The History of Bourbon, Scott, Harrison, and Nicholas Counties, Kentucky.  O.L. Baskin & Co., Chicago.

p. 562

Hutchinson Precinct... MRS. RACHEL CORBIN, P.O. Hutchinson; was born in September, 1806, in Bourbon County, Ky., daughter of Beal and Ella (Corbin) Marsh, natives of Maryland.  They were married in Baltimore and came to Kentucky at a very early period.  Our subject was married, in 1828, to Joshua Corbin, of Nicholas County.  He died in 1869 leaving six children: Abram F., Beal, Nathan M., Joshua M., Sarah Chaney, and Martha Dryden.  Nathan is a farmer in Saline County, Mo., Beal lives at home, and Joshua M. is County Surveyor of Fayette.  Mrs. Corbin owns 118 acres of excellent land, eight miles from Paris, which she rents, but resides in her house upon the farm.  She is a member of the Presbyterian Church.

10.  William Elsey Connelley & Ellis Merton Coulter.  1922.  History of Kentucky, Judge Charles Keer, Editor.  5 vols.  American Historical Society, Chicago and New York (online at Ancestry.com):

v. 4, p. 197

JOSHUA MARSH CORBIN.  For the greater part of half a century Joshua Marsh Corbin has been diligently employed in his profession as a civil enginner, and most of that time his headquarters have been in Lexington.  He is the present county surveyor of Fayette County, and altogether his official association with that office covers twenty years. Mr. Corbin was born in Bourbon County, Kentucky, a son of Joshua and Rachel (Marsh) Corbin.  His parents were also natives of Kentucky and of Bourbon County.  His father was born in 1800 and died in 1869, and his mother died in 1887, at the age of seventy.  Of their seven children, Joshua M. is the only survivor, and he was next to the youngest.  His father was a farmer, and like many Kentucky gentlemen was distinguished by a love of fine horses and high-class cattle.  During the Civil war period he was a stanch Union man, but in politics usually voted independent...