This is not a family legend but, rather, a newspaper legend. While it is true that Beulah Logan did survive the wreck of the missionary ship “Robert W. Logan” in The Mortlocks in 1899, I have not been able to verify the following story [summarized] from the New Oxford Item, New Oxford, Pennsylvania, 21 February 1907:
In 1900 Beulah Logan sailed on the steam ship “Aragul” from the Caroline Islands to Australia. Near New Ireland, she was swept overboard during a violent storm. Fortunately, she was a good swimmer and she was picked up by a boat manned by Christian Malays. This boat was then wrecked on a sandbar just two miles off New Ireland. A schooner was also wrecked and breaking up on the same bar. Just as the tide was rising and their boat began to float free, Beulah and the Malays saw a large group of cannibals in full war dress attacking the crew of the schooner. The cannibals clubbed and killed all 11 members of the schooner’s crew. Then they cooked and ate them while beating tom-toms, dancing and uttering “weird gutteral cries.” Beulah and the Malays were finally able to get their boat free but the cannibals caught sight of them and pursued them by canoe. As the cannibals gained on them, a German war ship from a nearby station came to their rescue and blasted the cannibal canoe with a four inch shell. Beulah was saved and thanked the Germans profusely.
I have found no confirmation for this story and suspect it was invented by the reporter to titillate the readers of the New Oxford Item.