I'm not convinced about the Sharman brothers. William's wife in earlier censuses is Mary, but she's born at Wilden not Lt Staughton. I can't find them in 1841, so it may be back to the CDRom set!*
Having said that I can't find any other marriage that fits other than the 1831 marriage
David
*Found them now in Duloe indexed as Sherman. William 30, Mary 25 and Samuel 6. Samuel's baptism in Eaton Socon is on the IGI, as is a subsequent daughter Jane, who died before the census. No sign of the Mary mentioned in her grandfather's will, nor is there a burial for her 1839-41. Strange that she wasn't baptised either. Something doesn't stack up and I can't put my finger on it.