These certainly seem like the same Merediths on the 1861, 71 and 81 census. even after being widowed Sarah was still enumerated as Meredith. Most interesting and throws a new light on this family.
Thanks Slowhands.

Emma Yearsley/Meredith went on to marry a John SHARE and the emigrated to Nanaimo Canada, whilst Edith/Alise?phoebe married a Wilfred SHARPE. Reuben married a Harriet Brown and Alfred married Emma Butterworth (they were correspondent WeeAnn's husband's GGrandparents)

Cheers
Bob