The Daily News Nov. 24, 1875 (London, England)
From the account furnished by Mr. Henry Smithurst, who was the engineer of the steamer in which the stream was explored. …” We often heard the natives speak of a large bird which could fly away with a kangaroo or a large turtle, but I scarcely credited the statement until I saw two of the birds myself. One was seated on the trunk of a large tree, and rose as we approached. The noise caused by the flapping of its wing resembled the sound of the locomotive pulling a long train very slowly. When it had flown away we heard another coming, with just the sound of an approaching goods (freight) train. I had a good opportunity of observing it, and it appeared to be sixteen or eighteen feet across the wings as it flew; the body dark brown, the breast white, neck long, and beak long and straight. Our guns had no effect on it. I feel sure I struck it, but flew on as unconcernedly as ever.”
This is from the same person just a different perspective.