To get a good feel for Sharp's leanings you would do well to read biographies of his acquaintances such as Charles Marson. Sharp and Marson were close pals for a long time and even co-operated on folksong projects. I think they were even in Australia together and Marson was a cleric in the East End of London when Sharp lived in London. I think he helped Sharp with his Somerset ventures also. I think there is a Mary Neal biography as well, or at least there are articles.