"She saw a Doctor Bird pass in his buggy and a farmer named Carboy go
by on foot."

"When was this?"

"While she was at the piano. She doesn't know the exact time."

There was a pause and the detective gave a faraway look out of the
window and down the bustling thoroughfare.

"So far as you are aware, Mr. Case, did Mr. Langmore have any personal
enemies?"

"I never heard of any."

"He was rich?"

"Yes."

"What was his business?"

"He was a dealer in patents and a promoter. Some thought he was rather
eccentric, but I never found him so. He used to have an office here in
New York but gave that up a year ago."

"Well, what is your idea of this crime?"

"I haven't any. But I know Margaret Langmore is not guilty."