1901 census with Sarah Smith and Joseph E at Denton:
https://familysearch.org/ark:/61903/1:1:X926-JCB1911 census with William, Sarah and Joseph as Ernest (occupation - iron founder):
https://familysearch.org/ark:/61903/1:1:XW1P-TK8Jamjar
AddedMarriage:
Marriages Sep 1870 Ashton 8d 805
SMITH William to BOARDMAN Sarah
Births:
SMITH, LYDIA ANN mmn BOARDMAN
GRO Reference: 1872 M Quarter in ASHTON UNDER LYNE Volume 08D Page 466
SMITH, JAMES WILLIAM EDWARD mmn BOARDMAN
GRO Reference: 1876 S Quarter in ASHTON UNDER LYNE Volume 08D Page 514
SMITH, THOMAS HENRY mmn BOARDMAN
GRO Reference: 1878 D Quarter in ASHTON UNDER LYNE Volume 08D Page 518
SMITH, ANNIE MARIA mmn BOARDMAN
GRO Reference: 1881 J Quarter in ASHTON-UNDER-LYNE Volume 08D Page 499
SMITH, FRANK mmn BOARDMAN
GRO Reference: 1885 M Quarter in ASHTON UNDER LYNE Volume 08D Page 541
SMITH, JOSEPH ERNEST mmn BOARDMAN
GRO Reference: 1891 S Quarter in ASHTON UNDER LYNE Volume 08D Page 497
Added: All six children still living in 1911, as per census image.