As I can see this page is quoted on a wikipedia article (albeit in Italian! :) I thought I had better update.. :
I've actually managed to find out that Robert Trewhella was actually born in Ludgvan, Cornwall although his family are the Trewhella family originally form Zennor.
He was Christened 30 May 1830 in Ludgvan, Cornwall.
He emmigrated to Italy first sometime around 1860. He married in Leghorn, Italy 2 January 1862, to Katherine (Kate) Lucy Thrupp. His brother John who had also emmigrated to Italy with him married Kate's sister, Anna Maria.
Robert was famous for building the Circum Etnea railway track in Sicily, but as well as this he built a number of other railways in Italy and Sicily, including the railway from Florence to Bologna, about 70 miles through the towering peaks and gorges of the Apennines.
He had two sons, Alfred Percy (b 1875 Castellammare di Stabia, Italy - d 1959 Taormina) and Charles Robert (b 1865 Florence, Italy - d 8 March 1893 Rome, Italy).
He died 6 Feb 1909 in Catania, Sicily and was buried in the Protestant Cemetary, Rome.
If any one is interested in any more, please get in touch responding to this post, not the previous! :)