From what I can see in electoral rolls, her and Donald are together at the same location, 1946, 1949, 1954 then they are in the same roll in 1957 but she is not listing herself as married but as Farmer in Poolburn. Donald McEwan and a lot of others, males and married women are all at Moa Flat as labourers and racemen.....family farm or something by the looks. From 1963 on he is not showing in the same roll as her. She seemed to always be in Otago but strangely, was cremated in Southland. That is the only Harriet Myrtle McEwan I can find in rolls.