From Wikipedia:
Original lyrics
The 1857 lyrics differed slightly from those we know today. It is unknown who replaced the words with those of the modern version.[2]
Dashing through the snow, In a one-horse open sleigh, O'er the hills we go, Laughing all the way. Bells on bobtail ring, Making spirits bright, Oh what sport to ride and sing A sleighing song tonight.
|: chorus :| Jingle bells, jingle bells, Jingle all the way! O what joy it is to ride In a one-horse open sleigh.
A day or two ago I thought I'd take a ride And soon Miss Fannie Bright Was seated by my side The horse was lean and lank Misfortune seemed his lot He got into a drifted bank And we got upset
|: chorus :|
A day or two ago The story I must tell I went out on the snow And on my back I fell A gent was riding by In a one-horse open sleigh He laughed as there I sprawling lie But quickly drove away
|: chorus :|
Now the ground is white Go it while you're young Take the girls along and sing this sleighing song Just get a bobtailed bay Two forty as his speed Hitch him to an open sleigh and crack! You'll take the lead.
|: chorus :|
Wiki also states that bob or bobtail is NOT the name of the horse.
Sorry guys. . .