Marj, Deep thanks for your help with my bad text. I realise I used a very confused "italianish" language - ooops! :-)
About Leopardi and Coleridge, I don't think they were able to meet, as I have read (on the timeline in your site at Virginia.edu) that Coleridge was not in Italy in the years in which Leopardi was travelling. There are some differences among the sources about Leopardi's travels, indeed, but approximately the periods should however be around 1822 (Rome) and 1825-1837. A google search made me find references to many works that compare them, and at a first sight it seems there is something to investigate. Unfortunately, on my side I am not so fond of Coleridge, but now I have found an interesting site :-)
Talking about his passage from erudition to beauty, I intended saying that Leopardi left the style of Arcadia for the newer one (which effectively was beginning to sound as an archaism at the time). Arcadia was the name of a movement (named after the region, supposed a bucolic symbol) that was born in Rome as a reaction to baroque in literature, with Metastasio as its major writer. At the time Leopardi started writing, it was quite influential to him, but he later realised the false (formal, somehow mannerist) taste of Arcadia and abandoned it for a more linear composing style (also, the passage was from a study-focused activity, to a prevalence of composition). I don't know if Arcadia is known abroad, whether it eventually is called in some other way, and I wonder if it's worth an article on Wikipedia, being a minor movement of italian literature and I haven't found many others here yet. --Gianfranco