"They're both still here, on the fourth floor, together"
"I suppose Mr. Mullholland left fairly recently."
"It doesn't look in the least bit dead. Who did it?"
Billy Weaver is here in Bath, London for work and is looking for a place to stay. It's about 9:00 at night and Billy is appealed by the Bed and Breakfast sign.
"No my dear. Only You."
"Haven't there been any other guests here except them in the last two or three years?"
After looking at the guest book and drinking tea, Billy tries to talk to the landlady about the two men that last stayed here 2-3 years ago but she often changes the subject. She later tells Billy that the two men are "still here."
"Goodnight Mr. Temple and Mullholland."
Billy finds out that the landlady has stuffed her parrot and dog.
The landlady asks Billy if he wants more tea but he didn't care for it. He claims that it tasted faintly of bitter almonds. Billy is the only guest since the two teens.
We can assume that Billy was killed and stuffed by the landlady, just like her pets and the two teens.
Looks can be deceiving, don't talk to strangers. The conflict of this story would be person vs person (Billy vs the Landlady).