What is the name of George Washington's horse?

Caractacus may be the answer you are looking for.

google.com/books?id=jxh4rGiz7GgC&pg=PA338&lpg=PA338&dq=Caractacus+jefferson&source=web&ots=F7a7dyBR2f&sig=srRyvBrb3oZgu5HENn1ufBGygv8&hl=en">http://books.google.com/books?id=jxh4rGiz7GgC&pg=PA338&lpg=PA338&dq=Caractacus+jefferson&source=web&ots=F7a7dyBR2f&sig=srRyvBrb3oZgu5HENn1ufBGygv8&hl=en Caractacus