Thornfield
| Name | Thornfield |
| Type | Steamer |
| GRT | 488 tons |
| Country |  British |
| Built | 1913 |
| Builder | Ramage & Ferguson, Ltd., Leith |
| Operator | Zillah Shipping & Carrying Co., Ltd. (W. A. Savage, Ltd.), Liverpool |
| History |
U-boat attacks on Steamer Thornfield
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 17 Aug 1915 | U 38 (Max Valentiner) | Sunk | 25 miles NNE of Smalls | London - Peel, Isle of Man | wooden huts | 0 |
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