This book and the others in the series are a compilation of line drawings and actual patterns taken from original costumes in museums. Janet goes into very particular detail, and the patterns can be used to recreate exactly the costumes. However, as they have been taken from real garments they are not sised in a modern way, therefore a good knowlege of dressmaking and the adjustment of patterns is needed. They can be used very successfully in conjunction with other books, for example Margot Hamilton Hill's 'the Evolution of Fashion', where modern sised patterns are given, so the style of Janet's dresses can be recreated with simpler patterns. A very good read!!