Mistress Pat is the 1935 sequel to Pat of Silver Bush. It chronicles Pat Gardiner's life taking care of Silver Bush from the time she is twenty to the time she is thirty-one. Pat's greatest love is her home and family, but when things change and she starts to be lonely at her beloved Silver Bush, she wonders if she will be as happy at Silver Bush as she always imagined.

Mistress Pat begins with Winnie's baby being born on Christmas, follows Pat and her sister Rae's various romances and conflicts, David and Suzanne Kirk moving into the Long Lonely House, Pat's engagement to David, Sid's marriage to Pat's enemy May Binnie, Judy's death, and finally the loss of Silver Bush.