&lsquo;Posty!&rsquo; Daisy Venables, who had been sitting curled up on the grass, jumped to her feet and made a bee-line for the drive, up which a familiar figure was to be seen slowly advancing. Evan Evans, &lsquo;Posty,&rsquo; was none too young, and this was a very warm day for September.<br />Joey Maynard, once Joey Bettany of the Chalet School, looked after Daisy with a laugh. &lsquo;She&rsquo;s nearly sixteen, but she doesn&rsquo;t get any more grown-up for all that. Rob! What on earth has she done to her frock? It was clean this morning, and just look at it!&rsquo;<br />The girl to whom she spoke lifted a curly black head from the daisy-chain she was making with the assistance of Joey&rsquo;s triplet daughters and glanced after long-legged Daisy, whose pale-green cotton frock looked as though she had wiped the chimney liberally round with it.<br />&lsquo;Mercy! What a sight! I don&rsquo;t know what she&rsquo;s been up to, Jo, so it&rsquo;s no use asking me. Here she comes with the letters, anyhow, so you can find out from herself.&rsquo; Daisy, with a handful of letters, came flying back to the group on the lawn.