Had a quick look
and cannot find HannahHannah DOUGHERTY died on Feb 19 1890 -
LINK to record #299Her death record shows an address the same as the 1901 census address and the informant was her brother John CATHCART; there is an error in her husband's name but I would be confident that this is the correct record as there is a burial in the City Cemetery
LINKWhat I did find was that Mansergh George DOHERTY remarried on August 24 1893
He was a widower and married Margaret MARSHALL aged 30
LINK to recordI also found ten children in the first family
Also at the time of her marriage Hannah was shown as Anna
Children I found are:
1 Ellen Louisa b. May 26 1867 Crevenagh, Omagh; m. John SIMPLE Oct 02 1896
2 Margaret b. Feb 08 1871 Crevenagh, Omagh; d. Nov 27 1891
3 James b. Mar 24 1873 Merrion Street
4 Andrew James b. Mar 04 1875 Merrion Street; m. Elizabeth LONSDALE Mar 30 1900
5 Sarah Ann b. Sep 14 1876 Grosvenor Street; d.Apr 23 1906
6 Robert b. Jun 23 1878 Grosvenor Street;
7 Mary Ann b. Jul 17 1880 Grosvenor Street;
8 Mansergh George b. Sep 18 1882 Eliza Street;
9 Maria Cathcart b. Apr 09 1885 Grosvenor Street;
10 Hamilton Forbes b. Aug 28 1887 Distillery Road; d. Mar 04 1908
When Hamilton was born Hannah was the informant -
LINKwhich to me would imply that she died between 1887 and 1893 when he remarried.I don't know what happened to the second Mrs. Doherty (aka Margaret Mitchell)