Lyle wracked his brain over how he should proceed with this, but there was no one action he could do without raising any suspicion. Had he any more slots left for servants, he could easily turn one of the guards into a servant before getting all the information from him, but unfortunately, that was not possible as the slots were full, and he wasn't about to get rid of any of his three servants as they were too valuable to him.
Lyle didn't even try to go and eavesdrop on the guards that were inside the mansion since he wasn't certain if there were any Silver Knights that were proficient in stealth inside. Even one Silver Knight was currently enough to destroy Lyle and his small band of vampires.