| ASA | Auckland Society of Arts |
| c | circa |
| CDM | Carole and Donald Mason |
| CSA | Canterbury Society of Arts |
| DM | Donald Mason, grandson of MH |
| DPAG 1969 | Exibition at the Dunedin Public Art Gallery in 1969 |
| ESK | Examination Schools Kensington |
| JLM | John Leslie McIndoe, son of MH |
| MEM | Mabel Elizabeth Mason, born McIndoe, daughter of MH |
| MH | Mabel Hill |
| MH | One-person exhibition organised by MH at the Otago Art Society in 1939 |
| NZAFA | New Zealand Academy of Fine Arts |
| OAS | Otago Art Society |
| ODT | Otago Daily Times |
| p | postulated |
| q | in file names instead of "?" |
| r | date from diary reference to painting/drawing in question |
| WAC | Wellington Art Club |