User talk:2600:8802:1100:13F0:C6:40:5062:2D8F

I changed the spelling Diefis into Diesis. Letters s and f at that time had an almost identical shape. The original publication, http://conquest.imslp.info/files/imglnks/usimg/7/7e/IMSLP337410-PMLP544639-vitali_artificii_musicali_op13.pdf shows clearly it is an s, not an f.