"By careful enquiry, we've learned that she resigned. By letter."
"How did you get that?"
"Well, law outfits seldom take kindly to characters asking leading questions. But an advertisement appeared for a librarian and I had Milly fill it. She pored through the personnel files and found a typed letter of resignation. Terse; disappointingly uninformative."
"Her apartment?"
"She ran a three-room job alone. A man appeared, armed with a letter from her. He packed up her stuff and it was removed from the premises by the Howdaille Moving and Storage Company. It is currently there in storage with the bill paid in advance for six months."
"Any more?"
"I had Morton enquire about a rental at that address and he was told that Miss Phillips had to return home because of illness of her father. That's all we could get. Morton got that information from the landlord after expressing first a desire to live there and second asking why the previous tenant moved out. Put it so that the landlord had to show him her letter to prevent a possible tenant from thinking that there was something odious about the premises."
"Then what?"
"That's all. Morton considered the place—apparently—for several days after putting down a twenty-buck deposit. Gave it up and forfeited the deposit on the grounds that his wife wanted a four room place."
"Um. Gone without a trace?"