1.  Marriage Record:

2.  1830 Census Index and Digital Images (online at Ancestry.com; Image #7 of 66; extracted by Diana Gale Matthiesen):¤•

1830

VA

Preston Co.

p. 5

Ln. 17

Cupp George

000 010 - 200 010

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	20-29	1800-1810	= George
2 females	4 or under	1825-1830	= Daughter B = Daughter A
1 female	20-29	1800-1810	= Christina

3.  Census Index:  U.S. Selected Counties, 1840 (Broderbund CD-316):  can't find, at least not in Preston Co., (W)VA.  There are several George CUPPs in more westerly states.

4.  1850 Census Index/Images (online at Ancestry.com; Image #200 of 278):  45th District, Preston Co., VA [now WV], p. 437B, 1117/1117, enumerated 30 Sep 1850 (extracted by Diana Gale Matthiesen):

Andrew Chidister	55	M	Farmer	4400	Md
Christena  "	54	F			Va
George     "	16	M	Laborer		"
Zachus     "	14	M			"
Isaiah     "	12	M			"
Minerva Cupp	19	F			"
Isaac Chidistler	18	M	Laborer		"

The ordering of the children suggests the marriage between Andrew & Christina was a second marriage for both of them; that is, Minerva is Christina's child from her first marriage and Isaac is Andrew's child from his first marriage.  The ages of the children put their spouses' deaths and their remarriage between 1830 and 1834.