_Middle Minoan I_.--With this period we have distinct advance in more directions than one. The Minoan artist is beginning to feel his way towards that polychrome style of decoration which reached such a remarkable development in the Kamares vases of the succeeding stage. In the decoration of his ware, which does not exhibit any marked advance in form upon that of Early Minoan III., he has begun to supplement the familiar white on the dark slip by adding yellow, orange, red, and crimson. The Petsofa figurines, already alluded to, which belong to this period, have a colour scheme of black and white, red and orange. Along with this development of the use of colour goes a corresponding advance in design. The motives of the former period are continued, but are much more developed, and more freely handled. Instead of being stiffly disposed in bands round the vessel, they are now frequently grouped with the idea of covering the ground of the vases in a graceful manner without any attempt at formal definition of the limits of each article of the design, the artist's idea being simply to fill, in a manner satisfying to the eye, the space upon which he had to work. The zonal system still persists side by side with the freer style, and is often very skilfully handled as a means of decoration. One of the characteristic features of Middle Minoan ceramic art--the use of relief to enhance the effect of the polychrome decoration through the addition of contrasts of light and shade--is seen coming into use in the earliest part of the period.