Young People's Pride by Stephen Vincent Benet

The rest of the party has scattered to the gardens or the porch -- Oliver has wandered into the library alone to wait for Peter who is bringing around the two-seater himself. It is a big dim room with books all the way up to the ceiling and a comfortable leather lounge upon which he sinks, picks up a magazine from a little table beside it and starts ruffling the pages idly. The chirrup of a telephone bell that seems to come out of the wall beside him makes him jump.

Then he remembers -- that must be Mr. Piper's office through the closed door there. He remembers, as well, Peter joking with his father once about his never getting away from business even in the country and pointing at the half dozen telephones on top of the big flat desk with a derisive gesture while detailing to Oliver the fondness that Sargent Piper has for secretive private wires and the absurd precautions he takes to keep them intensely private. "Why he went and had all his special numbers here changed once just because I found out one of them by mistake and called him up on it for a joke -- the cryptic old person! " Peter had said with mocking affection.