As imperceptibly as grief

• "The summer lapsed away"

  .summer is a symbolism of her happiness, which is now lost

  .suggests that seasons chnage gradually, without notice and our if our control
• "As twighlight long begun"

  .this is the time between day and night

  .implies that the darkness is drawn out-and is going on for a significant amount of time

  .this implies her suffering
• "Sequestered afternoon"

  . She forces herself into the dark, suggesting she chooses isolation

  .Links to context that she rarely had visitors and didn't leave her house for 30 years
• "The dusk drew earlier in"

  .implies passing if time has brought around change

  . Sunrise has been getting earlier, lighter earlier, suggests there is hope shining through for her to heal
• "The morning foreign shone"

  .foreign suggests familiar

  .shows she doesn't recognise her feelings

  .she has been in darkness for so long
• "Without a wing"

  .implies she has no sense of direction, she doesn't feel in control of human own feelings because the passing of time has healed her

  .without something guiding her, everything has gotten better, natural passing of time has transformed her feelings
• "Our summer made her light escape into the beautiful"

  .'escape' implies that it has gone unnoticed and has slipped away into something positive

  .implies that grief is only temporary

  .metaphor of summer

  .Time has healed her, although out of her control and awareness