| Topic | Postal Authority (if applicable) |
Sub-topic |
| Bamfield | Pacific Cable Station | See Pacific Cable |
| Belt & Buckle datestamps | Victoria | |
| Bicycles | For delivery of telegrams. | |
| Birds | Australia | See Cockatoos and Magpies. |
| Birth notice | England | Implication of wiring family and friends by telegraph. |
| Birthdays | Australia | Ornamental birthday delivery forms. |
| Australia | Birthday Greetings from the Queen - 100 years young!!!! |
|
| Miscellaneous | Telegram depicted on humourous postcards. | |
| Boer War | N/A | Cutting the Telegraph lines (photograph from The Sphere). |
| South Australia | The celebrations at Nairne celebrating the end of the Boer War. |
|
| Borders | SA, NSW and Vic | Use of the telegraph by Todd to define Colonial borders. |
| Queensland and SA | Measurement of distances from Boulia. | |
| Bush fires | Australia | Urgent telegram warning of fire danger. |