1.  Office of the Clerk Recorder, Santa Clara County, California. Marriage Certificates (database online at the official Santa Clara County, California, web site):

Dreischmeyer, Henry

Achermann, Catherine

03/23/1864

Book B, p. 193

Cert. #6400193

2.  1860 Census Every-Name-Index/Images (online at Ancestry.com):  can't find, though he should be unmarried in in Chicago.

3.  1870 Census Images (online at Ancestry.com; Image #199 of 676):  Gilroy P.O., Gilroy Twp., Santa Clara Co., CA, p. 100A, PN 67, enumerated 25 July 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

1870:  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

19

506

477

Dreshmyer H

29

M

W

Farmer

5000

1000

Germany

/

/

/

"     Kate

30

F

W

Keeping House

Hanover

/

/

"     Henry

6

M

W

California

/

/

"     Fred

4

M

W

"

/

/

"     Mary

8/12

F

W

"

/

/

Nov

"     Fred

20

M

W

Laborer

100

Germany

/

/

Ashmon Fred

28

M

W

"

150

"

/

/

Core? Fred

27

M

W

"

50

"

/

/

Kick??? Jno?

24

M

W

"

"

/

/

The 20-yr-old Fred DREISCHMEYER appears to be Henry's younger brother, just as Fred ASHMAN appears to be Catherine's younger brother.  I'm wondering if Fred DREISCHMEYER didn't accidentally get enumerated twice, once here, and once, seven weeks earlier, with the SCHLET family.  As an unmarried laborer, he could easily move about, and it wouldn't be the first time I've seen someone enumerated twice in the same census.  Otherwise, we've got two Fred DREISCHMEYERs, both born in 1850 in Germany and both living in Gilroy in 1870, which is possible if all the brothers have the same saint's name.

4.  1880 Census Microfilm Images (online at Ancestry.com):  Gilroy Twp. (outside of town), Santa Clara Co., CA, p. 410B, SD 1, ED 258, P# 30, enumerated 18 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

178

178

Dreischmeyer H.

W

M

40

/

Farmer

Germany

Germany

Germany

____________ Catherine

W

F

40

Wife

/

Keeping house

Hanover

Hanover

Hanover

____________ Henry

W

M

16

Son

/

At home

/

Cal.

Germany

Hanover

____________ Frederick

W

M

14

Son

/

At home

/

Cal.

Germany

Hanover

____________ Mary

W

F

10

Dau

/

At home

/

Cal.

Germany

Hanover

____________ William

W

M

8

Son

/

/

Cal.

Germany

Hanover

____________ Frank

W

M

6

Son

/

/

Cal.

Germany

Hanover

5.  Anon. [Preface signed by J.P. Munro-Fraser].  1881. History of Santa Clara County, California.  Alley, Bowen & Co., San Francisco, CA (online at HeritageQuest at Genealogy.com):

p. 603

Henry Dreischmeyer.  Born in Lippe-Detmold Principality, Germany, August 9, 1840, and came to the United States in 1854, having received his education chiefly in his native land.  He first settled in Chicago, and resided there until 1863, when he came to California by way of the Nicaragua route, arriving in San Frnacisco, April 27th, of the same year.  He forthwith proceeded to, and located in, the town of Santa Clara, but at the end of

p. 604

two months he transferred his domicile to San José, and started as a brickmaker, an occupation he followed until he went to Gilroy, moving to his present farm in the year 1869.  Married, September, 1863, Catherine Asheman, a native of Germany, and has:  Henry, born June 11, 1864; Frederick, born January 1, 1866; Lizzie, born November 18, 1867, died October 21, 1868; May, born November 22, 1869; William, born May 20, 1872; Frank, born May 20, 1874.