1.  Marriage Record:

2.  1920 Census Every-Name-Index/Images (online at Ancestry.com):  Hobart A. STROUP (æ 19, b. PA) is living in Bradford, McKean Co., PA, with his parents.  Mildred M. SMITH (æ 13, b. PA) is living in Bradford, McKean Co., PA (p. 44A), with her parents, Sydnie H. SMITH (æ 63, b. PA) & Mary H. (æ 60, b. NY).  Given Mary's age, Mildred cannot be her biological child (see 1930).

3a.  1930 Census Every-Name-Index/Images (online at Ancestry.com, Image #42 of 73):  368 East Main Street, Bradford City (Ward 6), McKean Co., PA, Roll 2079 (Book 1), p. 190A, SN 21A, ED 42-10, SD 3, enumerated 21 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).
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	24	25	26	27	28	30
*	368	469	474	Stroup J Harvey	Head	O	$18000	R	N	M	W	59	M	27	N	Y	PA	PA	PA	Y	Producer	Oil Field	E	Y	N
				______ E Carrie	Wife					F	W	52	M	19	N	Y	PA	NY	PA	Y	None
				______ A Hobart	Son					M	W	30	M	29	N	Y	PA	PA	PA	Y	Superintendant	Oil Lease	W	Y	N
*East Main Street

This enumerator took "last name first" to mean "name in reverse."  If Hobart is married, where is his wife?

3b.  1930 Census Every-Name-Index/Images (online at Ancestry.com):  Mildred M. SMITH (æ 23, b. PA; adopted daughter) is living in Bradford, McKean Co., PA (p. 47B), with her parents, Sidney H. SMITH (æ 72, b. PA) & Mary H. (æ 68, b. NY).

4.  State of Florida.  1998.  Florida Death Index, 1877-1998.  Florida Health Dept., Office of Vital Records. (online at Ancestry.com):

Name:	Hobart Augustus Stroup
Death Date:	May 1969
County of Death:	Brevard
State of Death:	Florida
Race:	White
Gender:	Male

3.  SSDI:  Social Security Death Index (online at RootsWeb.com):

Name	Birth	Death	Last Residence	SSN	Issued	Post-em
Hobart STROUP	6 Feb 1900	May 1969	32901 (Melbourne, Brevard, FL)	174-07-9927	PA	Yes
Mildred STROUP	22 Jun 1906	Jun 1975	32901 (Melbourne, Brevard, FL)	189-10-1821	PA	Yes

4.  Joseph Riesenman, Jr.  1943.  History of Northwestern Pennsylvania.  Lewis Historical Publ. Co., NY, pp. 232-233 (complete sketch online in the archive of the STRAUB Mailing List at RootsWeb.com).

HOBART A. STROUP - As a drilling contractor in the Pennsylvania and New York oil and gas fields, Hobart A. STROUP continues his connection with an industry in which he has been active since he was a boy... Mr. STROUP was born at Lafayete, McKean County, on February 6, 1900, son of Harvey J. and Edith (NEWTON) STROUP.  His father, who died on April 21, 1939, was born at Richardsville and came to the oil region of the State shortly after the early excitement, spending the rest of his life here.  He was also active in the general life of Bradford, his home for many years, and was prominent fraternally in the Odd Fellows, the Elks and the Masonic Order, in the latter of which he was affiliated with all higher bodies of both York and Scottish rites.  Edith (NEWTON) STROUP, the mother, was born at Newton and is still living.  She is a granddaughter of William F. ORMSBY, who drilled the first well in the Ormsby field and for whom the town of Ormsby is named. Hobart A. STROUP received his preliminary education in the public schools of Bradford and subsequently entered the University of Pennsylvania, from which he was graduated with the degree of Bachelor of Science in Business Administration in 1930...  Mr. STROUP is an independent Republican in politics and is affiliated with the Alpha Sigma Phi fraternity.  He is a member of the Valley Hunt Club, the Bradford Club and other organizations of this area.  In 1918, during the World War period, he enlisted in the United States Army and has also served an enlistment of three years in the 108th Field Artillery, Pennsylvania National Guard. On June 21, 1934, Mr. STROUP married Mildred SMITH, who was born near Lock Haven, daughter of S.H. SMITH, long an active figure in Bradford.

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