This cello music to I Saw Three Ships is in the key of C. Select the image below for a printable PDF of the melody. The I Saw Three Ships string play-along page has more versions of this carol, so you can play it with violin, viola, and bass. The band version of I Saw Three Ships is also in the key of C, so you can play along with woodwinds and brass instruments. If you are looking for a different key or instrumental range, the lead sheet page for I Saw Three Ships has versions in seven different keys, in treble, bass, and alto clefs. You can also view and print the lyrics to I Saw Three Ships.
See the transposition page for explanations and charts to help you determine the appropriate key to play in when performing with instruments that are not in concert key. More Christmas songs for cello.