Sometimes you need a bit of clarity....especially for slow people like me!
You are looking for this lot in any form prior to 1871 is that correct?
1881 census
7, Caves Terrace, Hammersmith, Fulham, Middlesex
Susan C Crocker...Wife...55..Chronometer Makers Wife....Saffron Walden, Essex
Walter J......".........Son...23.Comedian Unemployed Stepney, Middx
Edmond......".........Son...21...Draughtsman (Litho) Unemployed Mile End, Middlesex
Marie.........."........Daur...18...Chronometer Makers Daur...Mile End, Middlesex
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1871 census
Rutland St, Stepney, Mile End Old Town, Stepney, London, Middlesex
Samul C Crocker.....Head....60....watchmaker..................Mitford, Herts
Susan C........."........Wife....48.........................................Saffron Walden, Essex
Walter............"........Son.....16..electric telegraph student...Mile End, Middlesex
Edmund.........."........Son.....13.............................................Mile End, Middlesex Mary..............."........Daur....11.............................................Mile End, Middlesex Joel................".........Son.....10..............................................Mile End, Middlesex Morris.............".........Son......8...............................................Mile End, Middlesex
Mary Cornell....Wife's Sister..45.wid..................................Saffron Walden, Essex
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1851 census
Wills Alley, Saffron Walden, Essex
William Cornell........Head....22...........Ag Labr.....................Ashdon, Essex
Mary Ann...."...........Wife.....25............................................Ashdon, Essex
John Smith..............Son.......5..............................................Ashdon, Essex
Josiah Cornell...........Son.....2..............................................Ashdon, Essex
Alfred Cornell............Son.....1 week.....................................Walden, Essex
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Bryant