My name is Peter De Campi, my grandmother's maiden name was Maria Camisa and she was born in 1884 in Torsogno.
I have very few details but obviously she married my grandfather, Angelo De Campi and they came to London, England. They had four sons and one daughter. My grandmother(nona) died in 1947, alas I never got to meet her as I was born in 1956. I set up my own business twenty years ago and called it "Camisa software" as a tribute to her.
My grandfather had no family that we're aware of, so I think he must have been an orphan. When I looked up Torsogno in google maps (spelt Tarsogno) , it shows places near by called “Campi” and "Pieve di Campi" and I'm sure he would have taken his surname from one of these.
My brother has visited Torsogno. He commented that all the old men there looked like my uncle (), he also mentioned a small church with tomb stones. The tomb stomes on one side were all Camisa, on the other side they were all Palmigiani's. The Palmigiani's were the other dominant family in Torsogno and I get the impression they was some friction between the two.
Torsogno, being a very small place means that your grandfather and my grandmother, could well have been related or at the very least would have known each other. And I think it's wonderful that my rambling searches on the internet should have found your post. I don't think I've added very much to your quest but it's nice to have connected.