Transcript for Australian couple discovers world's oldest message in a bottle

We were wandering through the chains on in late January. To stopped a stifling heat up north and we. And it we had quite lot of rampant land sandwich islands. And we as a wandering around regardless there was a tremendous amount of rubbish on the ground which is really disappointing the June as a priest in there was rubbish everywhere and and I simply decides take some rubbish time and I've been down and picked it up and it was at my face it was uncovers. NightCall opponents and I was probably about half that was ex spies. And I picked up at that stage I realized my son was bumped. So I I didn't look at the vote I just walked up to Wear my son was boats. And handed the bottle to his go fringe lie helps retrieve he's come. And she's the one who discovered the scrolling and I could he would soaking in the background and she was saying. Let's go to cedar added it to mean she signal I think it's a sick. And then subjected out and realized it was a scroll and that's when she shaded Simi confident in the oven and trotted out. And we actually and wrote it. I'm rob basically that ninths but we couldn't see anything on it really confused by wouldn't say that we were really easy cooking dinner as we didn't really think much of it. But what we were all intrigued by it was eighteen. On the under on the diet I'm thinking eighteen. What could that mean. And that point we thought it was a hikes so we didn't think much of it and it the next hour to go to a friend whose gentlemen and he had to look at it invaded Simi. And save its passage on as a shining so written on and he said it's differently written on restricts the picture that I was selling him we could see the writing on it. Because the fact that had so much information in ink on the night we were right in city. Compare that directly with the with a Pallet gentlemen do a handwriting analysis of they meteorological general and it's exactly the same hand so we think it's. It's the captain captain the men of the palace he's probably right on this message but it means for the auto. But I report. And say right in the general that he had. From the public the board's. It's quite stunning ought never really experienced anything that corroborates that fully is this and the Germans themselves are very down. Night they accepted as an authentic foreign. Nice it is no reason to believe there are cards. I'm very difficult to get into Google public in order online anyway or be very difficult for someone to find that information and in my Catholics like situations. So on that basis we have both indicated the foreign than and looking very happy he's.

This transcript has been automatically generated and may not be 100% accurate.