— born in Christian Co., KY:
  3.  Eudora CLARK, b. 1850/1; d. by 1887; m. W.B. TAGGART
  4.  Winfield S. CLARK, b. 1851/2
  5.  James T. CLARK, b. 1850-60; d. 1850-60

— born in Muhlenberg Co., KY:
  6.  Charles M. CLARK, b. 1856-8
  7.  Jeannett CLARK, b. 1856/7; m. Mr. BAKER
  8.  Mary J. CLARK, b. 1859; d. by 1887
  9.  William C. CLARK, b. 1860/1
10.  Susan E. CLARK, b. 1862/3; m. C.R. WOOD
11.  John C. CLARK, b. 1864/5
12.  Etoile E. CLARK, b. 1865/6
13.  May / Mary E./L. CLARK, b. 1867/8
14.  Quintus C. / Quincy A. CLARK, b. Aug 1869

1.  Jordan R. Dodd, ed.  1993.  Kentucky Marriages:  Early to 1850.  Liahona Research, Orem, UT (Broderbund CD-229):

Clark, Matthew B.

Watkins, Mary J.

18 Apr 1842

Todd Co.

2.  1850 Census Every-Name-Index/Images (online at Ancestry.com, Image #30 of 137):  District No. 1, Christian Co., KY, Roll M432_196, p. 443B, 197/224, enumerated 20 Aug 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

Matthew B Clark	29	M		Farmer	1000	Ky
Quintillia C Clark	20	F				Ten
Sarah W Clark	2	F				Ky
Joshua B Atkins Clark	1	M				"
Henry Chick	15	M				"

3.  1860 Census Every-Name-Index/Images (online at Ancestry.com, Image #12 of 102):  Laurel Bluff P.O., District No. 2, Muhlenburg [Muhlenberg] Co., KY, Roll M653_388, pp. 702-703, PN 12-13, 89/89, enumerated 5 Jun 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

M B Clark	40	M		Farmer	3000	4000	Kentucky
Quintillia "	32	F		Domestic			Tennessee
Eudora     "	9	F					Kentucky
Winfield S "	8	M					do
Jennette   "	3	F					do
Charles    "	4	M					do
[next page]
Mary Jane	1	F					Kentucky

4.  1870 Census Every-Name-Index/Images (online at Ancestry.com, Image #49 of 104):  Greenville P.O., Court House Precinct No. 3, Muhlenberg Co., KY, Roll M593_490, p. 479A, PN 55, 388/390, enumerated 27 Jun 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

Clark M B	50	M	W	Farmer	2500	650	Ky
_____ Quintilia C	43	F	W	Keeping House			Tenn
_____ Winfield S	17	M	W	at Home			Ky		Blind
_____ Jenett	14	F	W	attending School			Ky
_____ Charles M	12	M	W	attending School			Ky
_____ Mary J	10	F	W	attending School			Ky
_____ William C	9	M	W	"			Ky
_____ Susan	7	F	W	"			Ky
_____ John C	5	M	W				Ky
_____ Etoil E	4	F	W				Ky
_____ Mary L	2	F	W				Ky
_____ Quincy A	10/12	M	W				Ky	Aug

5.  1880 Census Every-Name-Index/Images (online at Ancestry.com, Image #3 of 30):  Meyers Magisterial Dist. #5, Muhlenberg Co., KY, Roll T9_435, p. 150C, PN 3, SD 1, ED 139, enumerated 3 Jun 1880, official enumeration date 1 Jun 1880 (extracted by Diana Gale Matthiesen):

1880:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

1

2

3

4

5

6

8

9

10

13

16

21

24

25

26

18

21

Clark Beverly

W

M

60

/

Farmer

KY

VA

VA

_____ Quintilia

W

F

52

Wife

/

Keeping house

TN

KY

KY

_____ Winfield

W

M

20

Son

/

/

KY

KY

TN

_____ Charles

W

M

23

Son

/

Farmer

KY

KY

TN

_____ William

W

M

18

Son

/

/

KY

KY

TN

_____ Susan

W

F

17

Dau

/

At home

/

KY

KY

TN

_____ John

W

M

15

Son

/

/

KY

KY

TN

_____ Etoel

W

F

13

Dau

/

/

KY

KY

TN

_____ May

W

F

11

Dau

/

/

KY

KY

TN

_____ Quintus

W

M

9

Son

/

/

KY

KY

TN

6.  1890 Census:  the 1890 Census Population Schedules were destroyed.

7.  J.H. Battle, W.H. Perrin, & G.C. Kniffin, eds.  1887. Kentucky, a History of the State.  F.A. Battey & Co., Louisville, KY (excerpts online at the Kentucky Biographies Project):

M. B. CLARK, Muhlenburgh County, was born December 4, 1819, in Christian County, Ky., and is the third of fourteen children, six boys and eight girls (thirteen lived to be grown) born to James and Susan S. (Stubblefield) Clark, natives of Virginia; the father was a son of Matthew Clark, who married Mary Shelton, a native of Virginia; he moved to Franklin County, Ky., in 1811, where he purchased and improved a farm; was a soldier of the Revolution, and was quartermaster in Shelby's brigade in the war of 1812.  James Clark was a captain in the war of 1812, his wife was a daughter of Beverly and Mary (Shelton) Stubblefield; Beverly Stubblefield was a colonel in the Revolution, and came to Kentucky in 1812, and settled in Todd County near Trenton, where he purchased and improved a farm of 1,300 acres.  M. B. Clark was reared on a farm, received a limited education, and lived with his parents until sixteen years old, when he engaged as salesman in Allensville, Todd County, for eight years; then moved on a farm in South Christian County, and lived four years.  In 1854, he moved to where he now resided in Muhlenburgh County, near Penrod Station, on 365 acres of land; now owns 300 acres on Clifty Creek.  Mr. Clark was married March 4, 1841, to Mary J. Watkins, of Todd County, a daughter of Ephraim and Fannie (Bourne) Watkins, natives of Todd County.  Mrs. Clark died in 1843, and in August, 1848, Mr. Clark married Quintilla C. Atkins of Montgomery County, Tenn., a daughter of Thomas W. and Elizabeth (Carlile) Atkins, a native of Green County, Ky.  To this union were born fourteen children: Sarah W. (deceased), Joshua B. (deceased), Winfield S., James T. (deceased), Eudora (deceased wife of W.B. Taggart), Charles M., Jeannett (Baker), William C., Mary J. (deceased), Susan E. (wife of C. R. Wood), John C., Etoile E., Mary E., Quintus C., and ________ (sic). Mr. and Mrs. Clark are members of the Methodist Episcopal and Christian Churches, respectively.  Mr. Clark is a member of the I.O.O.F.; was a Granger.  He was elected justice of the peace in 1858; re-elected in 1862.  He cast his first presidential vote for Henry Clay in 1844; since 1868 he has voted Democratic, except in 1880, when he voted for Weaver.

Were both of our subject's grandmothers named Mary SHELTON?  Todd County records have his marriage license issued 18 Apr 1842.