Ralph Henry Barbour 
Guarding His Goal [EPUB ebook] 

Such was the legend, neatly inscribed on a small white card, that met the gaze of the visitor to Number 22 Whitson. As Number 22 was the last room on the corridor, and as the single light was at the head of the stairway, the legend was none too legible after nightfall, and the boy who had paused in front of it to regain his breath after a hurried ascent of the two steep flights had difficulty in reading it. When he had deciphered it and glanced at the little cardboard box below, in which reposed a tiny scratch-pad and a stubby pencil, he smiled amusedly ere he raised his hand and rapped on the portal.