The Quagmire Mansion was the home of the triplets Duncan, Isadora and Quigley, and their parents, Mr. Quagmire and Mrs. Quagmire. Like many other buildings in the story, the Quagmire Mansion has a secret passageway, this one leading to Montgomery Montgomery's House. This passageway was used by Quigley to flee the mansion at the time of the Quagmire fire. Both of the Quagmire parents perished along with the burning mansion.