| Topic | Relevant Location | Description. |
| Damage to lines | Cockatoos near Marble Bar, W.A. | |
| Darwin. | The bombing raids in February 1942. Lest we Forget. |
|
| Date stamps | Steel | Example from Maryborough, Victoria. |
| Damage to .. | Collingwood - repaired with twine. | |
| Queensland | Oval design | |
| Victoria | Belt & Buckle design | |
| Victoria | Oval design | |
| Western Australia | Oval - Post and Telegraph OR Telegraph | |
| Circular Telegraph | ||
| Classification | Categories to identify and name different formats. | |
| Eccentricity | The measure of how circular or elliptical a date stamp is. | |
| Date stamps - Telegraph Office Keeper. | New South Wales | Unusual inscription at Lalalty (NSW) and Drum Range (Qld). |
| Delays in transmission | Handstamps. | |
| Delivery envelopes - special | British New Guinea | Sent to Sydney by Lt. Governor Le Hunte in 1900. |
| Delivery dockets | New South Wales | Cards informing a recipient a telegram was waiting. |
| Australia | Various types (paper). | |
| Delivery of telegrams | Melbourne | Using pneumatic tubes between offices. |
| Deniliquin | New South Wales | The Great Riverine Demonstration - separating from New South Wales. |
| Die proofs | New South Wales | 6d pink indicium |
| 1/- black indicium | ||
| Queensland | 1/- brown indicium | |
| Victoria | 1/- blue indicium | |
| Western Australia | 1/- blue indicium | |
| Disease | Victoria | Use of telegrams to notify authorities of communicable disease. |