This looks like the family you have in 1851
SMITH, JOHN EASTON mmn RICHARDSON
GRO Reference: 1838 M Quarter in ST IVES UNION Volume 14 Page 189
SMITH, ANN mmn RICHARDSON
GRO Reference: 1841 J Quarter in SAINT IVES UNION Volume 14 Page 203
SMITH, JOSEPH mmn RICHARDSON
GRO Reference: 1845 D Quarter in ST IVES UNION Volume 14 Page 201
SMITH, JOSEPH mmn RICHARDSON
GRO Reference: 1846 D Quarter in ST IVES UNION Volume 14 Page 215
SMITH, GEORGE mmn RICHARDSON
GRO Reference: 1850 J Quarter in ST IVES Volume 14 Page 241