Emigration: England (possibly from London) to Illinois, US, in 1869.
Occupation: painter and decorator in Illinois.

1870 US census Illinois Kane Co., Dundee (ancestry.com image 31/52)
James Webb, 33, day laborer, b:England
Jane H. Webb, 30, keeping house, b:England
Jane H. Webb, 9, b:England
Maria Web, 7, b:England
Thomas W. (William?) Webb, 5, b:England
Baby (female), 1, b:IL

1880 US Census (LDS) household, Dundee, Kane Co., IL
James Webb, head of household, b:<1838> England, age 42, Painter, married, father b:England, mother b:England.
Jane Webb, wife, b:<1841> England, age 39, Keeping House, married, father b:England, mother b:England
Jennie Webb, daughter, b:<1861> England, age 19, At School, single, father b:England, mother b:England
Thomas Webb, son, b:<1866> England, age 14, At Home, single, father b:England, mother b:England
Mariah Webb, daughter, b:<1869> IL, age 11, At School, single, father b:England, mother b:England
George Webb, son, b:<1873> IL, age 7, At School, father b:England, mother b:England
Arthur Webb, son, b:<1875> IL, age 5, (no occup), father b:England, mother b:England
Flora Webb, daughter, b:<1876> IL, age 4, (no occup), father b:England, mother b:England
Note: Parents and children Jennie and Thomas must have immigrated to US between abt 1866 and 1869 since children listed before/in 1866 born in England and those in/after 1869 born in Illinois.

1900 US census, Illinois, Kane Co., Dundee Twp., West Dundee Village:
James Webb, head, b Sep 1836, age 63, widowed,b:Eng,Eng,Eng, immig 1869, 31 years ago, naturalized, Painter
Jennie H. Webb, dau, b Feb 1862, age 37, single, b:Eng,Eng,Eng, immig 1869, 31 years ago, (no status), (no occup)
George Webb, son, b Jul 1872, age 27, single, b:IL,Eng,Eng, Painter
Arthur Webb, son, b Nov 1874, age 25, single, b:Il,Eng,Eng, Painter
[Wife Jennett/Jane must have died before 1900]

1910 US census, Dundee Twp., Kane Co., Illinois (HeritageQuest):
James Webb, head, age 73, widowed, b-fb-mb:England, painter and decorator
Jennie, dau, age 47, single, b-fb-mb:England, no occupation
George, son, age 34, single, b:IL, fb-mb:England, painter and decorator
Arthur, son, age 30, single, b:IL, fb-mb:England, painter and decorator
[James and Jennie immigrated 1869].

1920 US census, Illinois, Kane Co., Dundee Downship,
James W. Webb, head, owns home free, 84, widowed, Immigrated 1869, naturalized 1875, b/fb/mb:England, no occupation
Arthur --, son, 44, single, b:Illinois, fb/mb:England, House Painter
Jennie H. --, dau, 54, single, Immigrated 1869, naturalized, b/fb/mb:England, no occupation

Graves in West Dundee Cemetery, West Dundee, IL, Section 3,seen in a row and photographed by GSC in August 2002 (no dates and only names and designations "father" and "mother" are written on the granite stones, which were in excellent condition in 2002). In order from left to right in the row:
Flora M Webb
Emma E Webb
Maria E Webb
Mother Jane T. Webb
Father James Webb
Arthur J Webb
Jennie W Webb
(Grave of son George Felix Webb observed in different section of same cemetery in August 2002 buried with his wife.)

Probably lived in London, England, before emigration, where three children were christened.

-------------below are notes that may not be about this individual-------------------------

New York Passengr Lists 1820-1957, ancestry.com:
SS Constantine, departed London, arrived New York 23 Aug 1869:
James Webb, 24, male, Laborer, origin Great Britain, destination U.S. America, Steerage

• Married: say 1860 in England

1. George Felix WEBB b: Jul 1872 in East Dundee, Illinois
2. Jane Harriet WEBB b: 12 Feb 1861 in London?, England
3. Thomas William WEBB b: 7 May 1865 or Mar 1866 in London, England
4. Maria Eliza WEBB b: 11 Feb 1863 in London?, England
5. Arthur James WEBB b: 20 Nov 1874 in Illinois
6. Flora M. WEBB b: abt 1876 in IL
7. Emma E. WEBB b: aft 1880?
8. Mariah WEBB b: abt 1869 in Illinois