My maternal grandfather was aboard the Persic when torpedoed. He was in the 33rd infantry being transported to the war in france. the german sub U-87 I think was the culprit that did the deed. He transferred to a british destroyer with only a rain coat and a mae west. he fell on the deck with his breath knocked out nof him with men yelling for him to send the rope back. he finally did . he said it was the 7th of september 1918 and it is on his discharge papers as the 7th sept.1918 as well . The Persic was an Austrailian ship pressed onto servive as a troop ship according to my research .