This is a noun & has something to do with placing a bet in Great Britain. I read it in a novel by
the late author Sarah Caudwell, "The Sybil in Her Grave" (Delacorte Press, 2000), p. 104: At a race track, the protag. was filling out a betting slip & was "...standing beside the quichet..." Even my English cousin's research over there met with no success: she couldn't find anyone who had even heard of the word, let alone knew its definition, not in a betting shop nor in the "Complete Oxford...". :-) So, if any of you, my fellow Wordsmiths, can suggest another reference I could check or know definitively what the denotation of "quichet" is, I'd appreciate it. Thanks!