The principles of design discussed here are far from new, and a debt to prior authors is fully acknowledged. Among those I have found most helpful are Raymond Unwin (Town Planning in Practice, 1908), Werner Hegemann (Civic Art, 1922), and Gorden Cullen (Townscape, (1961). The insights of more contemporary practitioners such as Doug Kelbaugh (Common Place, 1997), Peter Calthorpe and William Fult...