From the introduction:
“The simplest of stitches are used here with charming results: the open jacket, trousers, beret and socks are knitted almost entirely in garter stitch, with just a little double rib and stocking stitch on the beret. The fine soft yarn should lull even the most tender-skinned prince (or princess) to sleep. All these little garments are easy to make, including the socks, which are knitted on ordinary needles and have no complicated shaping.”