As the manuscript for this work is still intact, one can find two separate, distinct handwritings: Wolfgang's, and his father's Leopold. It can be seen that Wolfgang most likely wrote the tempo markings, key signatures and clefs, as well as all of the notes. Leopold was suspected to have a hand in the written words after bar seven, as the young Wolfgang seemingly had trouble judging the amount of space necessary to fit in the written text (as can be seen by the wave pattern of the bar lines near measure 7).
