Costume Patterns and Design, Max Tilke.
"In examining a garment one should first note those seams which are in any way emphasised or stressed by ornamental decoration, disregarding those which have arisen accidentally or through lack of material. Then the shape of the sleeves should be observed, the kind of neck opening, the fastenings, trimming and colour. The garments of the earliest epochs are the most simply cut and show the fewest seams. Complicated garments may be reduced to a characteristic core which remains when all decoration, indicated by seams, is removed."
"In the same way as archaeological excavations reveal different cultural epochs at different levels, so does the clothing of certain peoples display types of garment of different civilisations and epochs."