| 1928 | 1935 | 1935 | 1938 | 1946, 1949, 1954 | 1957 | 1963 | 1969 | 1972, 1978 | |
| Blackburn, Albert | soldier | stewart | stewart | porter | |||||
| Blackburn, Ethel May | married | married | married | married | |||||
| Blackburn, Frederick | labourer | shop assistant | labourer | labourer | labourer | stewart | retired | pensioner | retired |
| Cosgrove, Thelma Beatrice | spinster | ||||||||
| Residence: | 186 Vivian Street, N.P. | 52 Graham St | 127 Simeon Street | 29 Lytton Street | 61 Sydney Street | 61 Sydney Street | 33 King Street | ||
| District: | New Plymouth | Lyttelton | Christchurch South | Christchurch South | Riccarton | Sydenham | |||
| Region or Province: | Tarnaki | Canterbury | |||||||
Source: Ancestry - New Zealand, Electoral Rolls, 1853-1981