This is certainly one of old Pa Pitt’s most esoteric subjects. In rowhouse neighborhoods, there are often tunnel-like passages through to the rear yard of a house, with the upper storeys built over the passage. These outdoor passages are called “breezeways” in Pittsburgh; in other cities they may be called gangways or alleys. Sometimes the passage runs through one house; sometimes it is shared by two houses. We see examples of both in this little collection.