This is a transcription from Bramley and Stainer, Christmas Carols - New And Old, First Series. London: Novello & Co., no date, but likely in the 1860s.

A scan of the original can be found on www.ccel.org

"The First Nowell", also known as "The First Noel ", is a traditional English Christmas carol with Cornish origins, most likely from the early modern period, although possibly earlier. It is listed as number 682 in the Roud Folk Song Index.
The above text from the Wikipedia article "The First Noel" text is available under CC BY-SA 3.0.