After over 20 years of looking for him, I just discovered that my elusive ancestor Robert Ing was born in Chesham. You don't mention him in the message, but I wonder if you have come across any references to him. His son Thomas George Ing is my great grandfather.
1851 England Census Name Estimated Birth Year Birthplace Relationship Civil Parish County/Island Robert Ing abt 1808Chesham, Buckinghamshire, England HeadSt MaryleboneMiddlesex Ruth Ing abt 1800Paddington WifeSt MaryleboneMiddlesex Willm Ing abt 1832Paddington SonSt MaryleboneMiddlesex Thomas Ing abt 1835Paddington SonSt MaryleboneMiddlesex Emily Ing abt 1839Marylebone DaughterSt MaryleboneMiddlesex - 1851 England Census Record Name: Robert IngAge: 43Estimated birth year: abt 1808Relation: HeadGender: Male Where born: Chesham, Buckinghamshire, England Civil parish: St MaryleboneEcclesiatical parish: ChristchurchCounty/Island: Middlesex Country: EnglandStreet address: 19 Linden PlaceCondition as to marriage: Married Occupation: GardenerSource information: HO107/1490Registration district: Marylebone Sub-registration district: ChristchurchED, institution, or vessel: 11Folio: 543 Page: 34 Household schedule number: 113GSU Number: 87817-87818
I believe that Robert and Ruth were both dead by 1861, as their three unmarried children were living on thir own at that time. 1861 England Census Name Estimated Birth Year Birthplace Relationship Civil Parish County/Island William Ing abt 1833Paddington, Middlesex, England HeadSt MaryleboneMiddlesex[cab washer] Thomas Ing abt 1835Marylebone, Middlesex, England BrotherSt MaryleboneMiddlesex[gardener master] Emily Ing abt 1839Marylebone, Middlesex, England SisterSt MaryleboneMiddlesex