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Books about Colthorp:
Additions and corrections to, The Cowlthorp/Colthorp family: Descendants of James Cowlthorp, SR., (1778-1846)... by Laura Leyanna (1990)
Additions and corrections to the Cowlthorp/Colthorp family: Descendents of James Cowlthorp, Sr., (1778-1846),... by Laura Leyanna (1988)
The Cowlthorp/Colthorp family: Descendants of James Cowlthorp, Sr., (1778-1846) : eight generations, 1778-1981... by Ethel Clark (1982)
Wiki information Colthorp:
Scott Colthorp is a television director and cinematographer.