ANGLO-SAXON CHRONICLE
Note that the learned men who wrote the Chronicle accepted the notion that “fiery dragons were seen flying in the sky”. In another 1000 years, who knows what we observe today that will be laughed at by our progeny. The quotation also demonstrates that historical primary sources are not necessarily reliable because they were sometimes written by men and women with primitive outlook who accepted certain things without critical analysis.
The Anglo-Saxon Chronicle is a collection of annals in Old English, chronicling the history of the Anglo-Saxons. The original manuscript of the Chronicle was created late in the 9th century, probably in Wessex, during the reign of Alfred the Great (r. 871–899). Multiple copies were made of that one original and then distributed to monasteries across England, where they were independently updated. In one case, the Chronicle was still being actively updated in 1154.