of at least two different violins.

The same can be found on the drawing for the P-form. Here, at first glance, we are left with only the right half of a drawing. But in fact it does have a centre line, which you can, as far as I know, only establish with both sides of the ribs as mentioned above. If you make a mirror image of the right side curves onto the left, you can place all the visible dots on the left onto that line (Fig. 4). However, as with the G-model, these dimensions do not match the P-mould very well (Fig. 5), though with some imagination, and taking

into account wood shrinkage and the use of a different set of corner templates, the whole thing might work out. Also there is an extra set of dots (Fig. 6) which is very similar to the prominent model on the G-drawing (the bigger one). If you disregard the position of dot 1, it can be put quite freely on the lower curve of the c bout without making much difference in the overall outcome.

At this point it might be worth asking which drawing tool Stradivari used. Does anyone know if, circa 1700, pencils similar to ours were in use? Could the writing have faded?

Is this maybe why the left (also lighter) side of the P-drawing doesn't show any lines? Or have they been erased? In any case Stradivari must have occasionally considered it important to trace these ' pencil' lines with ink, maybe to underline the importance of commissions such as the CV and TV viola for the Grand Duke of Tuscany ? Also, these ink drawings show a good deal of skill if they were not traced off the actual ribs - and no maker would do this with ink, unless a mm was planed off the ribs afterwards
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