This is a transcription from Henry Ramsden Bramley and John Stainer, Christmas Carols New and Old (London: Novello, Ewer & Co., ca 1878).

The music is taken from a scan of the first verse that can be found on www.hymnsandcarolsofchristmas.com

"I Saw Three Ships " is a traditional and popular Christmas carol and folk song from England, listed as number 700 in the Roud Folk Song Index. The earliest printed version of "I Saw Three Ships" is from the 17th century, possibly Derbyshire, and was also published by William Sandys in 1833. The song was probably traditionally known as "As I Sat On a Sunny Bank", and was particularly popular in Cornwall.
The above text from the Wikipedia article "I Saw Three Ships" text is available under CC BY-SA 3.0.