Terrace Transformations Collectors' Greeting Card The special Terrace Transformations Collectors' Greeting Cards features section sketches by the author Professor Robert Powell. This pack includes hand-sketched sections of 26 featured houses by the author as well as a taxonomy of the plans of terrace houses. The perfect gift for architecture and sketching enthusiasts. Terrace Transformations Collectors' Greeting Card 4" x 6" or 148 x 105mm (A6 size) Matte paper 300gsm Pack of 27