New images: Marci letter wax

[ReneZ]

Also, it occurs to me that another way of working on the watermark might be to look at other letters from Marci in the 1660s and see if any of them are from the same stock.

I have sent out a couple of requests, but I don't have great expectations.

In any case, the Marci letter is precisely dated and we know where it was written. Same for all the other ones. The paper may still have come from a wider German area.

Rudolf seems to have bought his paper and parchment mainly from Memmingen.

With respect to the letters to Kircher still preserved in Rome, if no study was made until now, it seems unlikely that this will still be done, as these letters are in a precarious state due to 'sub-optimal' preservation activities in the 1960's. Fortunately, they have all been digitised.