killian chimtom ngala, bbc news, yaounde.found a sword believed to date from 1,500 years ago — that's before the viking era. saga vanecek stepped on the sword while playing in a lake this summer. the discovery was kept secret until now, to give archaeologists time to search the lake for other artefacts. richard galpin has the story. despite the approach of winter, this lake in southern sweden is still a popular destination for those in search of ancient treasures. because earlier this year there was an extraordinarily discovery here of something that had lain under the water for up to 1,500 years. and this is it. a sword dating back to the sixth century, before the vikings, and it's surprisingly well preserved. translation: scientifically, culturally and historically it's very important for us. it's an important piece of history for this area and it's attracted attention abroad. and the discovery was made not by a seasoned archaeologist or treasure hunter, but by an eight—year—old girl who had been playing in the water here w