We assumed it was supposed to be erased, as that is what fit best. One of our biggest problems was that, in our general dance repertoire, there are no dances we do commonly with contrapassi in them. This has a distinct problem, as our normal way of doing doubles does not involve closing the sequence. Three contrapassi on the left. SL indicates a step on the left foot.
SR indicates a step on the right foot.
Here is the dance as we have reconstructed it. On the Practice or Art of Dancing , p. 72. Domenico and Cornazano differ as to the details of these first two measures. The above is from Cornazano. Domenico prescribes, instead, two saltarelli.