Warning: another source has Mary the daughter of Sebastian's brother, Johannes, so I may have made a wrong connection here.
Father:  Sebastian STROPE
Mother:  Lydia VAN VALKENBURG

1.  Marriage Record:

2.  1800 Census Index/Images (online at Ancestry.com; Image #7 of 7; extracted by Diana Gale Matthiesen):¤•

1800

PA

Luzerne [now Bradford] Co.

Wysocks Twp.

p. 414

Ln. 14

Henry Tuttle

10010-10100-00

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1790-1800	= Son A
1 male	26-44	1755-1774	= Henry (b. 1773)
1 female	9 or under	1790-1800	= Margaret (b. 1790)
1 female	16-25	1774-1784	= Mary (b. 1772/3)

Listed four lines from Mary's parents, Sebastian & Lydia (VAN VALKENBURG) STROPE, who is two lines from Mary's brother, Henry STROPE. 

3.  1810 Census Index/Images (online at Ancestry.com; Image #3 of 3; extracted by Diana Gale Matthiesen):¤•

1810

PA

Luzerne [now Bradford] Co.

Wysox Twp.

p. 708-709

Ln. 14

Tuttle Henry

11000-22011

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1800-1810	= Son B
1 male	10-15	1794-1800	= Son A
0 males	26-24	1765-1784	= Henry (b. 1773)
2 females	9 or under	1800-1810	=
2 females	10-15	1794-1800	=
1 female	26-44	1765-1784	= Mary (b. 1772/3)
1 female	45 or over	in or bef. 1765	= Lydia (b. 1738)

Where's Henry?  Surely this is enumerator error and these are our subjects.  Mary's mother, Lydia (VAN VALKENBURG) STROPE, was widowed in 1805. 

4.  1820

5.  1830

6.  1840

7.  1850 Census Index/Images (online at Ancestry.com; Image #6 of 28):  Wysox, Bradford Co., PA, p. 266B, 39/43, enumerated 19 Aug 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

John Tuttle	45	M		Farmer	1000	Pa
Polly   "	77	F				NY
Abigail "	45	F				Pa

It's possible that John and Abigail are husband and wife, not brother and sister, but if so, the enumerator should have listed Polly after Abigail and we would expect some children in the household.  On the other hand, if they were brother and sister, and unless they were twins, we would expect John and Abigail to be different ages.  I'm going to treat them, here, as siblings, but that may be wrong.

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