Do you have him after 1881, he reverts to Armstrong or Black Armstrong.
Marriage at Gateshead, Sep 1889. Archibald George Armstrong and Elizabeth Ann Berkley.
In 1891, 8 Howard St. Newcastle All Saints. Archibald Armstrong 20, Brass Moulder, b. Gateshead, and wife Elizabeth Ann, 19.
In 1901 : 13 Marshall St. Byker,
Archibald Armstrong, 31, Brass Moulder, b. Newcastle,
Eliz Ann, wife, 29, b. Newcastle,
Thos H., son 9, b. Newcastle,
Eleanor, dau, 8, b. Newcastle,
Jessie, dau, 5, b. Newcastle,
John Geo, son, 3, b. Newcastle,
Robert, son 2, b. Newcastle.
In the census that can't be mentioned he's Archibald Geo. Black Armstrong.
In 1901, Archibalds son Thomas Henry Black Armstrong appears to have been double counted on the census as he's also listed with Thomas and Jane Black as a grandson.
92 Copland Tce, Newcastle All Saints,
Thomas Black, head 49, Warehouseman, b. Newcastle,
Jane, wife, 49, b. Newcastle,
+ 4 children., Peter, Abraham, David + Jane,
Thomas, H.B. Armstrong, Gson, 9, b. Newcastle.
Some children of Archibald and Elizabeth Ann, from census and FreeBMD:
Thomas Henry Black Armstrong, Newcastle Sep 1891.
Jane Black Armstrong, Newcastle Sep 1895.
John George Berkley Armstrong, Newcastle Mar 1898,
Robert Greener Armstrong, Newcastle Jun 1899.
Death in Newcastle Jun 1941, Archibald G.B. Armstrong. 71.
Alan.