The Family of Marie Madden: Census Returns

Marie Madden, aged 7 years, was living with her parents at the time of the 1910 Census but is not listed with her family in the 1920 Census, when she would have been about 17 or 18 years old. I did find an 18 year old Marie Madden living in nearby Cranberry Township, which I believe is William and Ella's daughter:

NOTES:
1:	Living with and working for Curtis Erwin and family in Cranberry, Venango County, Pennsylvania.
2:	The census schedule records that Marie could speak English, could read and write, and the both of her parents were born in Pennsylvania.
3:	The above information is taken from scanned images at www.ancestry.co.uk.

I was unable to find Marie in the 1930 Census either as Marie Madden or Marie Greenfield, then my cousin Carole Madden informed me that Marie had been married twice and that her first husband's surname was Lineman. With that information, I soon found the family in 1930:

1930 CENSUS OF CHERRYTREE TOWNSHIP, VENANGO COUNTY, PENNSYLVANIA:
NAME:	RELATION:	RACE:	SEX:	AGE:	STATUS:	OCCUPATION:	BIRTHPLACE:
Martin J Lineman	Head	White	M	30	Married	Pumper, Oil Wells	Pennsylvania
Marie Lineman	Wife	White	F	26	Married	None	Pennsylvania
Sylvester W Lineman	Son	White	M	7	Single	None	Pennsylvania
Ellsworth M Lineman	Son	White	M	6	Single	None	Pennsylvania
Glenn M Lineman	Son	White	M	5	Single	None	Pennsylvania
Elloise M Lineman	Daughter	White	F	2	Single	None	Pennsylvania

NOTES:
1:	Living on an unnamed road in Cherrytree Township, Venango County, Pennsylvania.
2:	The census schedule records that Martin and Marie could read and write, and Sylvester and Ellsworth were attending school.
3:	Both of Martin's and Marie's parents were listed as born in Pennsylvania.
4:	The exact age of Eloise, whose name was spelled incorrectly on the Census schedule, appears to have been written as "2 9/12", meaning 2 years and 9 months.
3:	The above information is taken from scanned images at www.ancestry.co.uk.

1940 CENSUS OF GREENVILLE, MERCER COUNTY, PENNSYLVANIA:
NAME:	RELATION:	RACE:	SEX:	AGE:	STATUS:	OCCUPATION:	BIRTHPLACE:
Marie Lineman	Wife	White	F	37	Married	-	Pennsylvania
Sylvester Lineman	Son	White	M	18	Single	-	Pennsylvania
Ellsworth Lineman	Son	White	M	17	Single	Mechanic, CCC	Pennsylvania
Glen Lineman	Son	White	M	14	Single	-	Pennsylvania
Eloise Lineman	Daughter	White	F	13	Single	-	Pennsylvania
Gene Lineman	Son	White	M	10	Single	-	Pennsylvania
Neal Lineman	Son	White	M	5	Single	-	Pennsylvania

1:	Living at 114 Second Street North, Greenville, Mercer County, Pennsylvania.
2:	Marie and her family were living in a rented house and paying $15 a month rent. Her future second husband, William Greenfield, was living a few houses along at number 107.
3:	The 1940 census schedules recorded information differently than previous censuses. Instead of recording the birthplace of each persons' parents they chose to select certain individuals to record 'Supplementary Questions'. In this case, that was Neal Lineman, whose father were listed as born in Pennsylvania. However, the Census Enumerator did not fill the form in correctly and the space for the mother's birthplace contained "English", the answer to the next question, 'Language spoken in home in earliest childhood'.
4:	Ellsworth Lineman was a government worker with the CCC (Civilian Conservation Corps). According to Wikipedia, the Civilian Conservation Corps was, "a public work relief program that operated from 1933 to 1942 in the United States for unemployed, unmarried men from relief families, ages 17–23".
5:	The above information is taken from scanned images at http://1940census.archives.gov.

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1920 CENSUS OF CRANBERRY TOWNSHIP, VENANGO COUNTY, PENNSYLVANIA:
NAME:	RELATION:	RACE:	SEX:	AGE:	STATUS:	OCCUPATION:	BIRTHPLACE:
Marie Madden	Boarder	White	F	18	Single	House Work	Pennsylvania