midnight
He was a quiet , uncommunicative lad . The sign was gone from the Bennetts ' gate when the car returned , and the two boys standing in the shadow across the way , saw the party go up the drive and disappear into the house ; there was still plenty of time for the festive program . They never knew what was said on the subject of the sign and the mysterious telegram . They kept it up at Bennetts ' till long after midnight . They played `` Think of a Number , '' and `` Button , button , who 's got the button ? '' and wore tissue-paper caps which came out of tinselled snappers , and had ice cream and lady-fingers and macaroons and chicken salad . When Connover went to bed , exhausted but happy , Mrs. Bennett tripped softly in to say good-night to him and to see that he had plenty of fresh air by `` opening the window a little at the top . ''