Just throwing this in on the off chance it's connected, it's a Kathleen Morrison of Prince Edward Park, Stranmillis, Belfast (wife of James Morrison), who died on 31 March 1973 and the newspaper death notices included mention of a niece Myrtle and Bertie McCagherty, a nephew Herbert Grieve, and a nephew Cecil and Pam, Christchurch, New Zealand. There were several other names included, but maybe still alive, so won't mention them here.