The Mystery of the Missing Millionaire — Kathryn Kenny

Trixie shook her head. “That's about all I can think of, Miss Ramsey. It really isn't much. But it should be enough to jog your father's memory…”

Laura Ramsey turned away abruptly, leaving Mr. Lytell and the two girls to stare at her back in confusion…

“I -- I can't ask my father,” she said in a chocked voice. “He's -- he's missing!”