IX
The fires have gone out on the open hearth. Listen early in the morning and toward evening for the rumbling, the small, muffled thunder, of the chimney swallows, as they come down from the open sky on their wonderful wings. Don’t be frightened. It isn’t Santa Claus this time of year; nor is it the Old Nick! The smothered thunder is caused by the rapid beating of the swallows’ wings on the air in the narrow chimney-flue, as the birds settle down from the top of the chimney and hover over their nests. Stick your head into the fireplace and look up! Don’t smoke the precious lodgers out, no matter how much racket they make.