Florence sighed heavily.  As she did so she heard the handle of the door turn and Bertha Keys came softly in.  Bertha brought a basket with her.  It contained some stockings belonging to the little ones which she was expected to darn.  She sat down on the low window-ledge and, threading her needle, proceeded to work busily.  She did not glance in Florence's direction, although Florence knew well that she was aware of her presence, and in all probability was secretly watching her.