Empty-House-That-Had-Had-Rats

Summary
The Empty-House-That-Had-Had-Rats was previously known as the Empty-House-That-Might-Have-Rats and the Empty-House-That-Did-Have-Rats. It was then the location in which Jack met a Fox Terrier, later to be known as Foxie. In a later book, Ralf Boxer and Tina Boxer live in The-Empty-House-That-Had-Had-Rats.

Location
In the Dog Den Mystery, Jack makes a nose map, and the Empty-House-That-Might-Have-Rats(The house's name at the time) was two houses south of Jack's new house.