1a.  LDS.  Family Search: Internet Genealogy Service:  IGI - International Genealogical Index (online at FamilySearch.org).

Samuel HILLER Spouse: Lulie S. DUNLAP Marriage: 10 Feb 1881, Crawford, Missouri Source: Marriage Records, 1829-1919. Crawford County (Missouri). Recorder of Deeds

1b.  Harlan County, Nebraska, Marriage Records (extracted at the County Courthouse in Alma, NE, by Kerry (Willis) Penn):

Marriage License for Maggie Willis and Samuel Hiller.  They were married April 10, 1887 in Orleans, Harlan Co., Nebraska. Parents of Samuel Hiller were listed as Edward Hiller and Mary A. Shriver.  Parents of Maggie Willis were John R. Willis and Sarah Trimball.  Samuel's place of birth was Illinois; Maggie's was Indiana.  Mrs. E.T. Bowyer was the witness, and they were married by W.A. Bowyer, Pastor, M.E. Church.  Samuel and Maggie were both 28 years old.

2.  1890 Census:  the 1890 Population Schedules were destroyed.

3.  1900 Census Index/Images (online at Genealogy.com):  not found, at least not as Samuel HILLER or HELLER in anywhere he would be expected.  A more thorough search might turn him up.

4.  1910 Census Index/Images (online at Genealogy.com; Image #31 of 52):  New River Precinct, Churchill, Co., NV, Roll 858 (Book 1), p. 21A, SN 19, SD Nevada, ED 2, enumerated 14 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	23	24	26	27	28	29
25	26	Hiller Sam	Head	M	W	51	m2	23			IL	Ger	Ger	Eng	Farmer	General Farm	OA	Y	Y	O	F	F	19
		______ Margaret	Wife	F	W	51	M1	23	0	0	IN	IN	IN	Eng	None			Y	Y

5.  1920 Census Index/Images (online at Ancestry.com; Image #5 of 6):  Grass Valley, Austin (Precinct No. 2), Lander Co., NV, p. 237B, PN 3B, SD 1, ED 27, enumerated 14 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	17	18	19	21	22	23	24	25	26	27	28	29
*	Fm	81	81	Hiller Samuel	Head	0	F	M	W	60	M	Y	Y	IL	Germany	German	Germany	German	Y	Farmer	General Farm	?	20
				______ Margaret	Wife			F	W	61	M	Y	Y	IN	IN		IN		Y	None
*Grass Valley

6.  1930 Census Index/Images (online at Ancestry.com):  not found.

7.  Documents from the Harlan County, Nebraska, Court House (extracted by Kerry (Willis) Penn):

Voluntary Assignment - "In the matter of assignment of Maggie Willis to C.H. Brown Sherriff in trust for her creditors." This document is dated February 17, 1887.  It lists the creditors and such, but does not state why there was a Voluntary Assignment.

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