1.  Marriage Record:

2.  1880 Census Every-Name-Index/Images (online at Ancestry.com):  Clark HILLIARD (æ 4, b. PA) is living in Madison Twp., Armstrong Co., PA (p. 289D), with his grandparents (q.v.).

3.  1890 Census:  the 1890 Census Population Schedules were destroyed.

4.  1900 Census Every-Name-Index/Images, Military and Naval Population Schedule (online at Ancestry.com, Image #6 of 7):  Candon, Llocos Sur, Luzon, Philippine Islands, Roll T623_1840, p. 503B, SN 2, Line 59, ED 186, Company G, 33rd Regiment, Infantry, enumerated 1 Jun 1900, official enumeration date 1 Jun 1900 (extracted by Diana Gale Matthiesen):

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	6	7	8	9	10	12	13	14	18	19	20
Hilliard Clark C	Private	Lawsham	Penna	W	M	Jan 1878	22	S	PA	PA	PA	Y	Y	Y

5.  1910 Census Index/Images (online at Ancestry.com, Image #26 of 49):  Peru Town, Belleville Twp., Chautauqua Co., KS, Roll T624_433 (Part 3), p. 112B, SN 14B, SD 3, ED 1, enumerated 4 May 1910, official enumeration date 15 Apr 1910 (extracted by Diana Gale Matthiesen):¤•

1910:  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	7	8	9	10	11	12	13	14	17	18	19	20	21	22	23	24	26	28
22	22	Hilliard Clark C	Head	M	W	31	M1	9			PA	PA	PA	Eng	Driller	Oil Fields	W	N	0	Y	Y	R	H
		________ Jenna M	Wife	F	W	27	M1	9	2	2	PA	PA	PA	Eng	None					Y	Y
		________ Franklin	Son	M	W	7	S				PA	PA	PA		None
		________ Mable	Dau	F	W	5	S				PA	PA	PA		None

Listed two households from Jenna's brother, Charles L. STROUP.

6.  1920 Census Every-Name-Index/Images (online at Ancestry.com, Image #2 of 10):  Fisher, Millcreek Twp., Clarion Co., PA, Roll T625_1551 (Book 2), p. 249B, SN 1B, SD 18, ED 73, enumerated 7 Jan 1920, official enumeration date 1 Jan 1920 (extracted by Diana Gale Matthiesen):¤•

1920:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

2

3

4

5

6

7

8

9

10

11

12

17

18

19

21

23

25

26

27

28

Fm

10

10

Stroup Mary

Head

O

F

F

W

73

W

Y

Y

PA

PA

PA

Y

None

Hilliard Clark

Son-in-Law

M

W

42

M

Y

Y

PA

PA

PA

Y

Driller

Oil & Gas Driller

W

________ Jennie

Dau

F

W

42

M

Y

Y

PA

PA

PA

Y

None

________ Mabel

GDau

F

W

15

S

Y

Y

PA

PA

PA

Y

None

7.  1930 Census Index/Images (online at Ancestry.com, Image #24 of 26):  Washington Twp., Stark Co., OH, Roll 1873 (Book 1), p. 264B, SN 12B, ED 76-131, SD 14, enumerated 28 Apr 1930, official enumeration date 1 Apr 1930 (extracted by Diana Gale Matthiesen):¤•

1930:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

24

25

26

27

28

30

31

290

290

Hilliard Clark

Head

O

6000

R

N

M

W

52

M

23

N

Y

PA

PA

PA

Y

Farmer

General farming

O

Y

Y

SA

________ Jennie

Wife

F

W

52

M

23

N

Y

PA

PA

PA

Y

None

________ Frank

Son

M

W

26

M

24

N

Y

PA

PA

PA

Y

None

N

N

________ Bertha?

D-in-Law

F

W

26

M

24

N

Y

KS

KS

KS

Y

None

________ James

GSon

M

W

1

S

N

KS

KS

KS

None

________ Mabel

Dau

F

W

23

S

N

Y

PA

PA

PA

Y

House work

Home

NP

________ William

Cousin

M

W

60

S

N

Y

PA

PA

PA

Y

None

??? ???

?

NP

N

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