1.  Indiana Marriage Collection, 1800-1941 (online at Ancestry.com):

Reason Carico	Sarah Ann Clark	6 Aug 1856	Co. not given	M.G. J.W. Wolfe
Reason Carrico	Susan Boyle	23 Feb 1863	Co. not given	J.P. J.L. Nash
Jeremiah Goad	Susan Boyle	17 Feb 1877	Co. not given	J.P. Daniel Case

Why did Susan revert to her maiden name?  Was her marriage to Reason annulled?

2.  1850 Census Every-Name-Index/Images (online at Ancestry.com):  Reson CARRICO (æ 13, b. IN) is living in Haddon Twp., Sullivan Co., IN, with his parents (q.v.).  Susan BEYLES (æ 16, b. VA — indexed "Bryles") is living in Haddon Twp., Sullivan Co., IN, with her widowed mother (q.v.).  Sarah CLARK (æ 18, b. IN) is living in Haddon Twp., Sullivan Co., IN (p. 216A), with her parents, John CLARK (æ 45, b. KY) & Hannah (æ 45, b. IN), plus siblings.

3a.  1860 Census Every-Name-Index/Images (online at Ancestry.com, Image #42 of 51 — indexed "Carieo"):  Carlisle P.O., Haddon Twp., Sullivan Co., IN, Roll M653_298, p. 748, PN 42, 296/296, enumerated 19 Jun 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):¤

Reason Carico	23	M		farmer	700	250	Ind
Sarah     "	24	F					do
Frances   "	2	F					do
John      "	1	M					do

Listed next to Sarah's parents, John CLARK (æ 60, b. IN) and his wife, Hannah (æ 58, b. IN), whose children jibe with those in 1850.

3b.  1860 Census Every-Name-Index/Images (online at Ancestry.com, Image #31 of 51):  Carlisle P.O., Haddon Twp., Sullivan Co., IN, Roll M653_298, p. 737, PN 31, 215/215, enumerated 15 Jun 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):-

Andrew Allsman	34	M		farmer		200	Ky
Eliza      "	35	F					Virginia
[Andrew & Eliza's five children]
Susan Boyle	23	F		domestic		150	Virginia

Eliza (BOYLE) ALLSMAN is Susan's sister.  Listed four households from Bazil & Frances (LONG) CARRICO.

4a.  1870 Census Every-Name-Index/Images (online at Ancestry.com):  Reason not found.  The only Reason CARRICO (or variation) in the entire United States is our subject's uncle, still living in Sullivan County.  I can't find Sarah, Frances, or John, either.

4b.  1870 Census Every-Name-Index/Images (online at Ancestry.com, Image #36 of 57):  Merom P.O., Haddon Twp., Sullivan Co., IN, Roll M593_361, p. 110B, PN 36, 268/250, enumerated 20 Jul 1870, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):(¤)

Boyl Thomas	51	M		Farmer	960	432	Virginia
____ William	50	M		Farmer	960	432	"
____ Sally	54	F		Keeping house			"
____ Jemima	34	F		At home			"
____ Susan	33	F		At home			"
Carrico William	5	M					Indiana

The older BOYLEs are Susan's siblings, but why is Susan surnamed BOYLE, not CARRICO?

4.  1880 Greene Co AR

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