Patty in the City by Carolyn Wells — Read

Patty's sunny disposition and invariable good humour exerted a beneficial influence on Lorraine, though the effects were slow and gradual. But the girl herself was trying to be more optimistic in her general attitude toward life, and to a degree she was succeeding.

But one afternoon she came up to Patty's apartment to sit with her for a while, and the expression of her face was quite as dark and gloomy as of yore.