Had a look at the actual 1851 census - The Enumerator wrote his S's very 'oddly' - the tail of the S reaches to the top - but it does appear to be Sam..... and should be Tom - as he is with Mathew and Ann on the 1861 census - West Dean

Coalway Lane End

Mathew - 55 - born North Nibley
Ann - 50 -born Stinchcombe, Glos
Ann - 21
Thomas - 12
Isaac - 10
Alice Mary - 7
Emily Ann - grand-daughter - 3 months.