When famous chroniclers lose it

Now have a look at what Matthew Paris, the famous 13th century St-Albans chronicler has to say under the heading of the year 1155 as he attempts to report the birth of young Henry, Henry II and Alienor of Aquitaine's son. I am afraid I don't have an English translation for this, but I'm sure most of you will find the Latin fairly uncomplicated:

"Anno Dom…