Last April, Agent X requested a full of my last work. He's known for not responding a lot of the time if he's not interested, so after nudging and not hearing back, I gave up. I'm getting ready to query my new manuscript now and I'd really like to query Agent X with it. What is the proper thing to do here? Do I query and mention the previous full, or query without mentioning it? Or hold off on querying him all together?