1.  Marriage Record:

2.  1810

3.  1820

1 of 10
1820 PA Union Penns Twp Selinsgrove
15 Haas Henry 110001-01101-0-000
16 Haas Abraham 101110-40010-0-000
17 Haas Valentine 320010-00010-0-000
1775-1794

4.  1830 Census Index and Digital Images (online at Ancestry.com; Image #9+10 of 24 — indexed "Valtentine Haas"; extracted by Diana Gale Matthiesen):

1830

PA

Union Co.

Penns Twp.

pp. 397B-398A

Haas Vallentine

022 130 100 - 100 000 100

 These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
2 males	5-9	1820-1825	= Henry (b. 1826/7) =
2 males	10-14	1815-1820	= =
1 male	15-19	1810-1815	=
3 males	20-29	1800-1810	= = =
1 male	40-49	1780-1790	= Valentine (b. 1780/1)
1 female	4 or under	1825-1830	= Mary (b. 1824/5)
1 female	40-49	1780-1790	= Barbara (b. 1785/6)

Also in Penns Township:  William HAAS (æ 50-60).

5.  1840

6.  Census Microfilm Records:  Pennsylvania, 1850 (Broderbund CD-305) and 1850 Census Images (online at Ancestry.com; Image #57 of 637):  Centre Twp., Union Co., PA, p. 28B, 389/413, enumerated 3 Sep 1850 (extracted by Diana Gale Matthiesen):

Valentine Haus	69	M	Farmer	1000	Pennsylvania
Barbara    do	64	F			"
Henry      do	23	M	Farming		"
Mary       do	25	F			"

The fact that Henry comes before Mary, despite being younger, could mean that Mary is Henry's wife, not his sister.  But then, men rarely married women their senior.