“Did you notice the number of the messenger?”

“It was seven-twenty-one.”

“Do you know the boy?”

“He is attached to the office on Broadway and Thirtieth Street.”

The waiter was unable to give the detective any more information.

Carter hurried to the office of the district messenger company.

There he found the messenger boy.

“Do you remember delivering a note on New Year’s Eve to a man who was dining at the Knickerbocker Cottage?” the detective asked the messenger.

“Was he a tall man?” the boy queried.

“Yes.”