The Priory of Finchelsea XVI

The home of sir Teabag Sumner was a comfortable residence on London's Gower Street. Still, the reception given to two women at some time after three in the morning was hardly friendly. After Lil had leaned on the bell for five minutes someone inside was heard cursing before the door was opened.
"Dr. Lilian Barton," Lil introduced herself to the annoyed-looking man who stood there. "This is Kathy Carlton, who came along for the ride. Is Sir Teabag home?"
The man said a very rude word, and Lil sighed.
"Please! I'm a lady, you know. Kathy's one too."
"Do you know what time it is?"
"Twenty past two in the morning. But I'll kip down on the sofa until sir Teabag turns up."
"Lilian Barton as ever was!"
The jovial cry of greeting came from behind the irritated servant. Lil's eyes widened in delight.
"Sir Richard Arcos! What in the world are you doing here?"
"Burgling the place. No, I'm imposing on sir Teabag Sumner's hospitality while taking a sabbatical in which I'm studying at Dr. Williams' Library. I saw your lecture advertised."
"Don't remind me," Lil stepped into the hall, kicked off her shoes and collapsed into the nearest chair. "I'm just about ready for suicide after that!"
"So why are you here? Surely you could top yourself quite comfortably in the privacy of your own home? Or hotel room."
"Because a man called Dr. Llewellyn Pryce-Rees-Evans-Jones got murdered in the Church of Christ the King, and he left clues that suggested I did it."
"Did you?"
"No!"
"Well then, lass," Sir Richard smiled. "We must find out who did, and why."