*Cave*, _intj._ (Eton).—“Beware!” A byword among boys out of bounds when a master is in sight. [From the Latin.] *Cedar*, _subs._ (Eton).—A pair-oared boat inrigged, without canvas, and very “crank.” [No longer in use.] *Certificate Good-day*, _subs. phr._ (Stonyhurst).—_See_ GOOD-DAY. *Chaff*, _subs._ (Christ’s Hospital).—A small article or plaything. Also as _verb_ = to exchange; to barter. [A.S. _chaffere_ = to deal, exchange, or barter: as _sub._ = merchandise. Also (North) _chaffle_ = to haggle.] 1388. WIMBELTON, _Sermon_ [MS. Hatton, 57, p. 4]. If thou art a margchaunt, disceyve not thi brother in CHAFFARYNG. 1440. _Promptorium Parvulorum_ [MS. Harl. 221, ff. 206]. Rooryne or chaungyne on CHAFFARE for another. 1450. _MS._ Bibl. Reg. 12 B. i. f. 19. _Emere vel vendere_, Anglice to CHAFFARYN. 1844. _Reminis. of Christ’s Hospital_ [_The Blue_, Aug. 1874]. Pocket-knives, combs, “precious” marbles, tops, and all the other numerous nondescript articles which go to make up the CHAFFS of a Blue. 1877. BLANCH, _Blue-Coat Boys_, 96. CHAFF me your knife. _Adj._ Pleasant; glad. Also CHAFFY. [Possibly, in this sense, a memory of chaff = banter.] Whence, CHAFF FOR YOU = “So much the better for you.” _Cf._ VEX. _Intj._ An exclamation of joy or pleasure. *Challenge*, _subs._ (Westminster).—The entrance examination for Queen’s Scholarship. _See_ quot. [In ancient times (_vide_ STOW) St. Peter’s was one of the three great schools whose scholars were accustomed on the days of their patron Saints to challenge each other to a contest of grammar and versification, which was apparently the earliest form of what was afterwards developed not only into the Westminster CHALLENGE, but into the Eton MONTEM (_q.v._).] 1867. COLLINS, _The Public Schools_, p. 182. He undergoes a very severe examination, called the CHALLENGE, the form of which must have been preserved from Queen Elizabeth’s days, and is the last surviving relic of the old scholastic disputations. *Chamber-day*, _subs._ (Winchester).—A day on which access was allowed to CHAMBERS (_q.v._) during the whole day.—MANSFIELD. *Chambers*, _subs._ (Winchester).—The College bedrooms: in Commoners called GALLERIES (_q.v._). [CHAMBER is commonly dialectical for bedroom.] _See_ ELECTION CHAMBER. *Charity-remove*, _subs._ (Harrow).—A “remove” assigned to boys who have remained in the Form below for several successive school quarters.