It may well be the best £9-25p you ever spent Dan, if it was me I would take the plunge, until you find anything in the newspapers, I don't think you will move forward with him, I have a great great grandfather who was just the same, but he used more elaborate names, such as Marco Emile De St Hilaire and Alexander Charles Borromeo, when his real name was Charles Tucker, I had to go down to Kew just to move on another 4 years, still don't know what became of him when he was released from prison.
Regards Pat.