Origin of phrase

When I was in typing class in high school, we had to practice over and over (and over) the following sentence:

Now is the time for all good men to come to the aid of their country.

Where did this phrase originate? Evidently, it began its life as "...to come to the aid of their party." Explanation:

From the typewriter it came, and to the typewriter it shall return: the phrase was proposed as a typing drill by a teacher named Charles E. Weller. Incidentally, many typing books now use the variant "Now is the time for all good men to come to the aid of their country" instead, because it exactly fills out a 70-space line if you put a period at the end.

Now you know!