— born in Pennington Co., SD:
5.  Thurlow J. BIDDLE, b. 5 Jan 1910, Pennington Co., SD

1.   Iowa: County Marriages, 1838-1934 (online at familysearch.org):

1  No. of License	325
2  Date of License	June 25 1904
1 By whom affidavit, if any, is made	C. H. Werder
2 By whom consent to marriage is given
3  Full Name of Groom	G. A. Biddle
4  Place of Residence	Eldora Iowa
5  Occupation	Butter Maker
6 Groom's age next birthday	24 years
7  Color | 8  Race	White | Cau
9  No. of groom's marriage	1st
10  Groom's place of birth	Delphi Ind.
11  Groom's father's name	David Biddle
12  Groom's mother's maiden name	Ellen Miller
13  Full name of bride	Anna Forman
14  Bride's maiden name if a widow
15  Bride's place of residence	Eagle South Dak.
16  Bride's age next birthday	19 years
17  Color |  18  Race	White | Cau.
19  No. of bride's marriage	1st
20  Bride's place of birth	Eagle S. Dak.
21  Bride's father's full name	Jas. (sic) Forman
22  Bride's mother's full maiden name	Cathrine Novak
23  Where and when married	Eldora Iowa June 26 1904
24  Witnesses	Emil & C.H. Werder
25  By whom married, name and office	Geo B Shoemaker, Minister
1  Date of return
2  When registered

.  1890 U.S. Census:  the 1890 Census Population Schedules were destroyed.

.  1900 U.S. Census Every-Name-Index/Images (online at Ancestry.com):  can't find Garfield, and I really tried.  Anna FORMAN (æ 15, b. Feb 1855, SD) is living in Eagle Twp., Brule Co., SD, with her parents (q.v.).
 

.  Anon.  1904.  The Badger:  The Book of Class of MCMIV, University of Wisconsin, Madison, Wisconsin (online at Ancestry.com):

Dairy Course...

FIRST YEAR...

Biddle, Garfield Arthur...............Eagle, S.D.

.  1904.  Alleged marriage of Garfield & Anna (civil recording of marriages in South Dakota didn't begin until July of 1905).

.  Anon.  1905.  Fifth Annual Report of the Food and Dairy Commissioner of the State of South Dakota.  News Printing Co., Aberdeen, SD.  p. 61 (online at books.google.com):

LICENSED BUTTERMAKES AND CHEESEMAKERS—Continued
Name	Location when Licensed	Buttermaker or Cheesemak'r
G. A. Biddle...................	Eagle..........................	Buttermaker

.  1905 South Dakota State Census (extraction online at Ancestry.com, plus added data from familysearch.org):

Name	G A Biddle	Anna Biddle	Mildred Biddle
Gender | Race	Male | White	Female | White	Female | White
Marital Status	Married	Married	Single
Age	24	19
Birth Place	Delphi, Indiana	Eagle, SD	Armout, SD Dakota
Years in State	1	19	10 weeks
Residence Place	Mt. Vernon, Davison Co., SD
Father's Birthplace	Ohio	Germany	South Dakota
Mother's Birthplace	Indiana	Wisconsin	Indiana
FHL Film Number	2281101	2281101	2281101

.  South Dakota Birth Index, 1856-1915 (online at Ancestry.com):

Name:	Thurlow Biddle
Gender:	Male
Birth Date:	5 Jan 1910
Birth Place:	Pennington, SD
Father:	Garfield Biddle
Mother:	Anna Forman
File Date:	30 Oct 1910

.  1910 U.S. Census Every-Name-Index/Images (online at Ancestry.com, Image #5 of 7):  Underwood Twp., Pennington Co., SD, Roll T624_1486, p. 141A, SN 34A, SD 2, ED 90, enumerated 21 Apr 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

27

28

29

95

96

Biddle Garfield A

Head

M

W

29

M1

6

Indiana

Indiana

Pennsylvania

Eng

Farmer

Farmer

OA

N

0

Y

Y

O

F

F

69

______ Anna R

Wife

F

W

65

M1

6

4

4

South Dakota

Bohemian

Bohemian

Eng

Y

Y

______ Mildred E

Dau

F

W

5

S

South Dakota

Indiana

South Dakota

______ Wilbur E

Son

M

W

3

S

Nebraska

Indiana

South Dakota

______ Spenser F

Son

M

W

2

S

Illinois

Indiana

South Dakota

______ Artie M

Dau

F

W

1

S

South Dakota

Indiana

South Dakota

Why is Thurlow not enumerated?  Is it because he's an infant? 

.  thelandpatents.com — may be the most confusing web site I've ever been to.  In a nutshell: Garfield A. BIDDLE of Pennington Co., SD, got a land patent (#SDRC-0002526) on 10 Jul 1911 at the South Dakota Field Office for land at:  S7.T1N.R11E (Black Hills Meridian). 

.  Anon.  Wednesday, 23 Apr 1913.  New York Produce Review and American Creamery 36(1): 30 (online at books.google.com):

IOWA... Sioux City, Ia.—G. A. Biddle has moved here from Philip, [Haakon Co.,] S.D.

.  Anon.  1913.  R.L. Polk & Co.'s Sioux City Directory [for] 1914.  R.L. Polk & Co., Publ. Sioux City, Iowa (online at Ancestry.com):

p. 130

Biddle Garfield A (Anna), lab Bolles & Rogers, r 3501 6th av, M S.

.  1920 U.S. Census Every-Name-Index/Images (online at Ancestry.com, Image #5 of 22):  876 Cedar St., Yankton (Ward 3), Yankton Co., SD, Roll T625_1726, p. 195A, SN 3A, SD 312, ED 267, enumerated 5+6 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).

1

2

3

4

5

6

7

8

9

10

11

12

13

14

16

17

18

19

20

21

22

23

24

25

26

27

28

*

876

58

58

Pausen Paul C

Head

O

F

M

W

45

M

Un

Un

Y

Y

Denmark

Danish

Denmark

Danish

Denmark

Danish

Y

Mason

House

W

______ Anna

Wife

F

W

34

M

Y

Y

So. Dakota

Bohemia

Bohemian

Bohemia

Bohemian

Y

None

Biddle Mildred

Dau

F

W

14

S

Y

Y

Y

So. Dakota

Indiana

So. Dakota

Y

None

______ Spencer

Son

M

W

12

S

Y

Y

Y

Illinois

Indiana

So. Dakota

Y

None

______ Artie

Dau

F

W

10

S

Y

Y

Y

South Dakota

Indiana

So. Dakota

Y

None

______ Thurlow

Son

M

W

8

S

Y

Y

Y

South Dakota

Indiana

So. Dakota

Y

None

*Cedar St

The BIDDLE children are Paul's stepchildren.

.  1920 U.S. Census Every-Name-Index/Images (online at Ancestry.com, Image #6 of 7):  Eagle Twp., Brule Co., SD, Roll T625_1716, p. 39B, SN 3B, SD 312, ED 26, enumerated 20 Feb 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

16

17

18

19

21

22

23

24

25

26

27

28

29

Fm

57

59

Forman Edward J

Head

O

F

M

W

30

M

Y

Y

South Dakota

Bohemia

Bohemian

Bohemia

Bohemian

Y

Merchant

General Store

OA

43

______ Edith

Wife

F

W

28

M

Y

Y

South Dakota

Bohemia

Bohemian

Bohemia

Bohemian

Y

None

______ Orville

Son

M

W

6

S

N

Y

South Dakota

South Dakota

South Dakota

None

______ Richard

Son

M

W

5

S

South Dakota

South Dakota

South Dakota

None

______ Lyle

Son

M

W

8/12

S

South Dakota

South Dakota

South Dakota

None

Biddle Wilbur

Nephew

M

W

13

S

Y

Y

Y

South Dakota

Indiana

South Dakota

None

Edward J. FORMAN is Anna's brother.

.  1925 South Dakota State Census (transcription only, online at Ancestry.com):

Name

-

-

-

Wilbur Biddle

-

-

-

-

-

-

-

-

Gender | Race | Age

-

-

-

Male | White | 18

-

-

-

-

-

-

-

-

Birth Place

-

-

-

Nebraska

-

-

-

-

-

-

-

-

Ethnicity

-

-

-

American

-

-

-

-

-

-

-

-

Marital Status

-

-

-

Single

-

-

-

-

-

-

-

-

Marriage Date

-

-

-

-

-

-

-

-

-

-

-

-

Spouse

-

-

-

-

-

-

-

-

-

-

-

-

Years in State

-

-

-

-

-

-

-

-

-

-

-

-

Arrival Place

-

-

-

-

-

-

-

-

-

-

-

-

Years in the USA

-

-

-

-

-

-

-

-

-

-

-

-

Arrival Place

-

-

-

-

-

-

-

-

-

-

-

-

Naturalized

-

-

-

-

-

-

-

-

-

-

-

-

Religion

-

-

-

Methodist

-

-

-

-

-

-

-

-

Father Birth Place

-

-

-

Indiana

-

-

-

-

-

-

-

-

Mother Birth Place

-

-

-

South Dakota

-

-

-

-

-

-

-

-

FHL Film No. | Sheet No.

-

-

-

2368163 | 70

-

-

-

-

-

-

-

-

.  1930 U.S. Census Every-Name-Index/Images (online at Ancestry.com, Image #4 of 5):  "Township 93 Range 57" [T93N.R57W], Yankton Co., SD, Roll 2232, p. 217B, SN2B, ED 68-26, SD 6, enumerated 7 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	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	30	32
37	37	Paulson Paul C	Head	O	Y	M	W	59	M	19	N	Y	Denmark	Denmark	Denmark	Danish	1887	Na	Y	Farmer	General Farm	E	Y	N	36
		_______ Anna	Wife		X	F	W	45	M	19	N	Y	South Dakota	Czechoslovakia	Czechoslovakia				Y	None
		_______ Thurlow J	Son		X	M	W	19	S		Y	Y	South Dakota	Indiana	South Dakota				Y	None

Thurlow J. BIDDLE is Paul's stepson, not his son.

.  South Dakota Death Index, 1879-1955 (online at Ancestry.com):

State File No	Surname	Given Name	County of Death	Death Date MO DA YR
1?5071	PAULSON	PAUL MRS	YANKTON	10-30-33

.  Find-a-Grave: Entries (online at FindaGrave.com):

Name	Anna Paulson
Birth	unknown
Death	1933
Note	Lot 1, Block 389
Burial	Yankton City Cemetery Yankton, Yankton Co., SD
Memorial #	50509773

.  U.S. Social Security Applications and Claims Index, 1936-2007 (online at Ancestry.com):

Name	Garfield Arthur Biddle
SSN	466-01-2391
Gender | Race	Male | White
Birth Date	Nov 1880
Birth Place	Rockfield [Carroll Co.], Indiana
Father Name	David Biddle
Mother Name	Ellen Miller
Type of Claim	Original SSN.
Notes	Mar 1937: Names listed as GARFIELD ARTHUR BIDDLE

Is this the Garfield who married Anna?

.  LDS.  Family Search:  Family Trees (online at familysearch.org).

.  Public Member Trees (online at Ancestry.com).

.  WorldConnect / Ancestry World Trees (online at wc.rootsweb.ancestry.com).