Anonymous, The Annals of Wales(Part VI)
“ The Llandaf account, however, claims the disease spread through the country "as a column of a watery cloud, having one end trailing along the ground, and the other above, proceeding in the air", killing any man or animal it touched. Most likely, the "great death" mentioned here and at AD 548 in the Annals of Ulster was the arrival in the British Isles of Justinian's Plague, which almost certainly was an early strain of the bubonic plague. If there was a separate disease, it may have been relapsing fever, which produces jaundice and was known as "yellow plague" in Irish. ”
