secret exit

For the Rat's-Hole was the secret exit that existed behind the jamb of the fireplace at the upper end of the hall.

Bonnemain himself had lived in those same rooms for six years, and he had had the secret exit constructed.

It still was necessary to assume a secret exit from the house.

The secret exit in the garden wall she had skilfully hidden.

That reminded her of her secret exit, and then she remembered Sophie Cornell, whose image had quite faded from her memory.