Ernest Flagg Quote

Saving space: (a) By the utilization of the large volume of space contained in the slopes of roofs... (b) by the reduction of floor thickness... (c) by the utilization of space (as on shipboard) for lockers, cupboards, closets, etc... (d) by the use of thin partitions... and (e) by elimination of corridors... so that the least possible area may be required for communication.

Small Houses: Their Economic Design and Construction (1922)