sundial

aurinkokello A simple timekeeping device in which the shadow cast by a vertical pole or plate (the gnomon) is used to indicate the time of day.
(RQ:Chmbrs YngrSt)

Elbows almost touching they leaned at ease, idly reading the almost obliterated lines engraved there. ¶ (nowrap) understood it," she observed, lightly scornful. "What occult meaning has a sun-dial for the spooney? Im sure I dont want to read riddles in a strange gentleman's optics."