Article by Eleanor B. Sachs, compiled from notes by Nancy Andrews Reath, on the weave structures of Han Dynasty silks from the Noin-Ula burial mounds in the Pennsylvania Museum of Art. It explains the complex warp-faced compound cloth weave, with several colored warps, a main weft and a hidden secondary weft, which is the same technique as the Lou-lan silks found by Stein. It also describes a fine fancy gauze weave. Technical analyses of two examples give materials, colors, thread counts and sizes, and a diagram (Fig. 1) shows the layered structure.