You felt that No.

91 was unhappy, and that it could only be rendered happy by a 'To let' standard in its front patch and a 'No bottles' card in its cellar-windows.

It possessed neither of these specifics.

Though of late generally empty, it was never untenanted.

In the entire course of its genteel and commodious career it had never once been to let.
Go inside, and breathe its atmosphere of a bored house that is generally empty yet never untenanted.