1.  Marriage Record:

2.  1870 Census Every-Name-Index/Images (online at Ancestry.com, Image #32 of 50):  Earlville P.O., Oley Twp., Berks Co., PA, Roll M593_1306, p. 577B, PN 32, 243/260, enumerated 19 Aug 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

Eisenhower William	26	M	W	Cabinet Maker		500	Penna
__________ Catharine	21	F	W	Keeping House			Penna
__________ Barbara	3	F	W				Penna
__________ Mary	1	F	W				Penna

3a.  1880 Census Every-Name-Index/Images (online at Ancestry.com):  Presumably, William is deceased, but I can't find Catharine or Mary, either.  They must be living because they reappear in 1900.  It's probable that they're simply mis-indexed so badly I can't pull them up.

3b.  1880 Census Every-Name-Index/Images (online at Ancestry.com, Image #34 of 48):  Richmond Twp., Berks Co., PA, Roll T9-1100, p. 200D, PN 40, SD ?, ED 60, enumerated 17 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

21

24

25

26

281

298

Boyer Levi

W

M

63

/

Farmer

PA

PA

PA

_____ Elizabeth

W

F

60

Wife

/

Keeping House

PA

PA

PA

_____ Henry

W

M

27

Son

/

Works on Farm

PA

PA

PA

_____ Thomas

W

M

19

GSon

/

Works on Farm

PA

PA

PA

_____ Hannah

W

F

32

Dau

/

Domestic Work

PA

PA

PA

_____ Lizzie

W

F

16

Dau

/

Domestic Work

/

PA

PA

PA

Eisenhower Barbara

W

F

13

GDau

/

At Home

/

PA

PA

PA

__________ Willie

W

M

*

GSon

/

/

PA

PA

PA

*Looks like "9" was written over "8."

4.  1890 Census:  the 1890 Census Population Schedules were destroyed.

5.  1900 Census Every-Name-Index/Images (online at Ancestry.com, Image #9 of 28):  554 10th Street, Reading City (Ward 11), 1st Precinct, Berks Co., PA, Roll T623_1379 (Book 1), p. 28A, SN 5, SD 7, ED 83, enumerated 5 Jun 1900, official enumeration date 1 Jun 1900 (extracted by Diana Gale Matthiesen):

1900:  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

15

19

20

21

22

23

24

25

27

*

554

78

79

Straub Mary

Head

W

F

Oct 1868

31

Wd

0

0

PA

PA

PA

Dress maker

0

Y

Y

Y

R

H

Homan James M

S-Father

W

M

Jun 1857

42

M

17

PA

PA

PA

Freight Conductor

0

Y

Y

Y

_____ Catharine

Mother

W

F

Apr 1849

51

M

17

4

4

PA

PA

PA

Y

Y

Y

Eisenhower William P

Brother

W

M

Jun 1871

28

S

PA

PA

PA

Machinist

0

Y

Y

Y

Homan Earl C

Brother

W

M

Jul 1888

11

S

PA

PA

PA

At school

10

Y

Y

Y

Boyer Clara R

Aunt

W

F

Oct 1861

38

S

PA

PA

PA

Tailoress

0

Y

Y

Y

*10th Street

6.  Charles C. Boyer.  1915.  American Boyers.  Press of the Kutztown Publ. Co., Kutztown, PA (online at GenealogyLibrary.com):

p. 255

G (9) Kate Boyer, daughter of Levi Boyer and Elizabeth Wanner, married William Eisenhower. Dead. Children: (a) William Eisenhower. Address (1910) Reading, Pa. (b) Barbara, married Schoener. Address (1910) Reading, Pa. (c) Mary, married Straub. Address (1910) Reading, Pa. Kate Boyer married a second time, James Homan. Address (1910) Jersey City, N.J. Children: Earl Homan.