There are 8 Elizabeth deaths recorded on the carlisle history page, or I suppose she could have remarried.
The Carlisle pages only include burials for which a stone exists, as the site owner offers to sell photographs/MIs. The ages are easily found from FreeBMD.
ROUTLEDGE, Elizabeth d 13.12.1912 (34)
ROUTLEDGE, Elizabeth d 12.10.1918 (77)
ROUTLEDGE, Elizabeth d 15.06.1927 (68)
ROUTLEDGE, Elizabeth d 14.03.1928 (68)
ROUTLEDGE, Elizabeth d 23.05.1935 (60)
ROUTLEDGE, Elizabeth d 15.01.1939 (70)
ROUTLEDGE, Elizabeth d 02.12.1942 (54)
ROUTLEDGE, Elizabeth Margaret d 28.06.1934 (63)
You say James died 5 Feb 1909. He is commemorated on stone 15/18 ... along with 5 other ROUTLEDGEs. Perhaps their dates my be of use to you. Elizabeth doesn't appear on that stone.