This is my cousin's great grandfather and the family story is that he was a descendant of a Ukrainian Jew who immigrated to the American Colonies. Older family members speculated that he was Colored. He can be found in the 1850 Auburn, De Kalb Co., Indiana census as a white laborer living with the family of a prosperous farmer. In 1852 he hired on as a guard on a wagon train going to Washington state. He became a successful dairy farmer and died in Clallam Co., WA in 1886.
Autosomal dna testing shows that my cousin has a very small amount of African ancestry, consistent with having a great grandfather who was caucasian and African American.
In checking the 1820 Pennsylvania US Census I found two families of Cline Free Colored Persons. One was Jens Cline in Buck's Co., PA who I could not find in the 1830 census. The other was David Cline (Kline in one reference) who lived in the Northern Ward in Philadelphia. 1820 - CLINE, DAVID Philadelphia NORTH WARD Free Colored Persons 9, males under 14 – 1.
Besides the US Censuses THE GREATER PHILADELPHIA GEOHISTORY NETWORK provided Directories and maps.
1830 US Census Philadelphia, PA Mulberry Ward All free colored families on same page 12 John Still 13 Ann Blair 14 David Klein Free Colored Persons – 7.Males under 10 (2), males 10-23 (1), males 24-35 (1), females under 10 (1), females 10 to 23 (1,) females 24-35 (1) 15 Robert Alberson 16 Samuel Mathes 17, 18, 19 all whites 20 Alex Patterson 21 Thomas Johnson (Mulberry Ward was at the far northwest of Philadelphia)
McElroy’s Philadelphia City Directory 1839 Cline, David Milkman Duke n Hanover 1840 Cline, David milkman 1841 no David Cline/Kline 1840 US Census Philadelphia, Pine Ward John Cline Free Colored Persons 1 male 30-39, 1 free colored female 36 to 54. Last line on this page:Jno. Elliott 1 male 60-70, 1 female 20-30, 2 Free Colored females 24-36. (Pine Ward was also at the far north end of the city.)
This Cline family in Philadelphia looks like a good possibility for being Elliot Cline's relatives. I would guess that the milk man may also have been a dairy man who used the large pasture areas to the west of the city. Perhaps young Elliot dreamed of owning his own dairy but had to go a long journey far from Pennsylvania to realize that dream. I hope I can find some records to place my cousin's great grandfather with that family.