Polly is said to have been born in "Sturbridge, CT," but Sturbridge is in Massachusetts.

— born in Randolph, Orange Co., VT:
  3.  Roswell CORBIN, b. 17 Jun 1800; m. 5 Oct 1826, Weymouth, Norfolk Co., MA, Mehitable ORCUTT (1807-1880)
  4.  James Madison CORBIN, b. 6 Feb 1801; d. 9 May 1891, Mexico, Miami Co., IN; m. 13 Apr 1835, Sandusky, OH, Sophia POOL (1800-1862)
  5.  Lyman W. CORBIN, b. 6 Aug 1802
  6.  Mary "Polly" CORBIN, b. 8 Feb 1804; d. 6 Feb 1883, Pithole City, PA; m. 30 Dec 1837, Randolph, VT, Harvey COPELAND (1799-1883)
  7.  Marshall CORBIN, b. 6 Sep 1807; m1. Sarah __?__ (1808-); m2. Fanny __?__ (1801-)
  8.  Harvey W. CORBIN, b. 4 Jun 1813 or 4 May 1816
  9.  Susanna / Susan CORBIN, b. 4 Jun 1817; d. by 1820
10.  Caroline CORBIN, b. 14 Apr 1820
11.  (Son?/Grandson?) CORBIN, b. 1820-25

Mary would have been 48 years old when Caroline was born, which is an extremely late birth for any woman.  Is Caroline really a granddaughter?  A later child is even less likely.

I'm troubled by the duplicate entries in Randolph and Roxbury (see Sources below), especially the entry for Polly.  I wonder if two different Daniel CORBINs, who each married a Mary, aren't being mixed up.  Secondary sources are accepting that they are one couple, and I will go along with them, but I have misgivings.

1.  Marriage Record:

2.  LDS.  Family Search: Internet Genealogy Service:  IGI - International Genealogical Index (online at FamilySearch.org):

Location: Randolph Twp, Orange, Vermont: Daniel CORBIN; Birth: 17 Dec 1795 Hannah CORBIN; Birth: 08 Jul 1798 Roswell CORBIN; Birth: 17 Jun 1800 James M. CORBIN; Birth: 06 Feb 1801 Lyman W. CORBIN; Birth: 06 Aug 1802 Polly CORBIN; Birth: 08 Feb 1804 Marshal CORBIN; Birth: 06 Sep 1807 Harvey W. CORBIN; Birth: 04 Jun 1813 Susan CORBIN; Birth: 04 Jun 1817 Caroline CORBIN; Birth: 14 Apr 1820 Father: Daniel CORBIN; Mother: Polly Source: General Index to Vital Records of Vermont, early to 1870. Vermont. Secretary of State

Location: Roxbury Twp, Washington, Vermont: Hannah Smith CORBIN; Birth: 09 Jul 1798 Polley CORBIN; Birth: 23 Jan 1805 Father: Daniel CORBIN; Mother: Polly BADGER Source: General Index to Vital Records of Vermont, early to 1870. Vermont. Secretary of State

Secondary sources argue that this is the same couple, but are they?

3a.  1800 Census Index/Images (online at Ancestry.com, Image #1 of 2; extracted by Diana Gale Matthiesen):

1800

VT

Orange Co.

Roxbury

Roll 51

p. 562

Ln. 15

Corbin Danl

10010-10100-00

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1790-1800	= Daniel Jr. (b. 1795)
1 male	26-44	1755-1774	= Daniel (b. 1766)
1 female	9 or under	1790-1800	= Hannah (b. 1798)
1 female	16-25	1774-1784	= Polly (b. 1771)

Secondary sources argue that this is the same couple as the one enumerated in Randolph.

3b.  1800 Census Index/Images (online at Ancestry.com, Image #4 of 8; extracted by Diana Gale Matthiesen):

1800

VT

Orange Co.

Randolph

Roll 51

p. 553

Ln. 10

Corbin Danl

10010-21011-00

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1790-1800	= Daniel Jr. (b. 1795)
1 male	26-44	1755-1774	= Daniel (b. 1766)
2 females	9 or under	1790-1800	= Hannah (b. 1798) = daughter? sister? sister-in-law?
1 female	10-15	1784-1790	= sister? sister-in-law?
1 female	26-44	1755-1774	= Polly (b. 1771)
1 female	45 or over	in or bef. 1755	= mother? mother-in-law?

Listed next to Solomon ORCUTT, which reinforces that this is our subject because our subject's son, Harvey, married an ORCUTT.

4.  1810 Census Index/Images (online at Ancestry.com, Image #X; extracted by Diana Gale Matthiesen):

1810

-

- Co.

- Twp.

Roll -

p. -

Ln. -

-

-

These data indicate:

5.  1820 Census Index/Images (online at Ancestry.com, Image #13 of 14; extracted by Diana Gale Matthiesen):¤•

1820

VT

Orange Co.

Randolph

Roll 127

p. 220B/258

Ln. 19

Daniel CORBIN

100001-21010-0-100

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1810-1820	= Harvey (b. 1813)
1 male	45 or over	in or bef. 1775	= Daniel (b. 1766)
2 females	9 or under	1810-1820	= Caroline (b. 1820) = Susanna (b. 1817)
1 female	10-15	1804-1810	= Mary (b. 1804)
1 female	26-44	1775-1794	= Mary (b. 1771)
1	person engaged in agriculture

Where are the rest of the children?  We're missing Hannah, Roswell, James, Lyman, and Marshall.  Is this really our subject?

6.  1830 Census Index/Images (online at Ancestry.com, Image #3 of 32 — indexed "Corliss"; extracted by Diana Gale Matthiesen):¤•

1830

VT

Orange Co.

Randolph

Roll 185

p. 176

Ln. 4

Daniel Corbin

010 000 001 - 010 000 010

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	5-9	1820-1825	= son? grandson?
1 male	60-69	1760-1770	= Daniel (b. 1766)
1 female	5-9	1820-1825	= Caroline (b. 1820)
1 female	50-59	1770-1780	= Mary (b. 1771)

Mary is very old to be the mother of either of these children.

7.  1840 Census Index/Images (online at Ancestry.com):  can't find.

8.  1850 Census Every-Name-Index/Images (online at Ancestry.com, Image #37 of 42):  Bethel, Windsor Co., VT, Roll M432_930, p. 196A, 284/300, enumerated 9 Oct 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):¤•

Harvey Corbin	34	M		Farmer	700	Vt
Mary      "	29	F				"
Harvey E  "	2	M				"
Mary L    "	1	F				"
Daniel    "	84	M		Farmer		Conn
Mary      "	76	F				"

.  Broderbund.  World Family Trees.  Vol. 5, Pedigree #947.  The file contains a family group sheet for Daniel & Polly and one for their son, Harvey, both with less information than I have, except that it follows a line down from one of Harvey's daughters.

.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com), in particular, a file submitted by Daphne GAWNE.

.  One World Tree (online at Ancestry.com).