1.  Marriage Record:

2.  1820

3.  1830 Census Index/Images (online at Ancestry.com):  not found, and I did a page-by-page search of Upper Darby Twp.

4.  1840 Census Index/Images (online at Ancestry.com, Image #13-14 of 18 — indexed "Strooper"; extracted by Diana Gale Matthiesen):¤

1840

PA

Delaware Co.

Upper Darby Twp.

Roll M704_457

pp. 117B-118A

Ln. 4

George Stroopes

001 000 100 - 001 001

0200000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	10-14	1825-1830	= Son
1 male	40-49	1790-1800	= George (b. 1799/1800)
1 female	10-14	1825-1830	= Elizabeth (b. 1829/30)
1 female	30-39	1800-1810	= Elizabeth (b. 1799/1800)
2	persons employed in agriculture

5.  1850 Census Index/Images (online at Ancestry.com; Image #14 of 49):  Upper Darby Twp., Delaware Co., PA, Roll M432_776, p. 273B, 105/105, enumerated 2 Aug 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):¤

Geo. Stroop	50	M		Farmer	5000	Pa
Eliz.   "	50	F				"
Eliz.   "	20	F				"
Thos. Maine	14	M				"

6.  1860 Census Images (online at Ancestry.com; Image #40 of 65):  Kellyville P.O., Upper Darby Twp., Delaware Co., PA, Roll 1105 (Book 1), p. 739, PN 68, 452/475, enumerated 27 Jun 1860 (extracted by Diana Gale Matthiesen):

George Stroup	62	m		Farmer	10,000	791	Penna
Elizabeth  "	61	f					Do
William Nezendank	30	m				200	Mechlenberg
Elizabeth   "	33	f					Penna

7.  Mea culpa, I forgot to note the source telling me Elizabeth's surname.