The Allens categorised most photographs in the collection based on the shipping company owning the vessel at the time each photo was taken. I have respected their categorisation in most cases.
Companies A
| Company Name | Company Name | Company Name | Company Name |
|---|---|---|---|
| Albyn Line | Anchor Line | Anglo Newfoundland Line | Athel Line |
| Atlantic Transport Line | Avenue Line | Aznar Line |
Companies B
Companies C
| Company Name | Company Name | Company Name | Company Name |
|---|---|---|---|
| Caltex Line | Canadian Pacific Line | Cape Line (Lyle Shipping Company) | CGT Line |
| Chapman Line | Charrington Gardner Locket | Chevron Line | Clan Line |
| Clyde Shipping | Coast Lines | Comben Longstaff | Common Brothers |
| Cory Line (William Cory & Son) | Counties Line | Court Line | Cunard Line |
| Currie Line |
