O'CALLAGHAN v. Waller & Beckwith Realty Co. , 15 Ill. 2d 436 ( 1958 )
Llewellyn v. Board of Education , 324 Ill. 254 ( 1926 )
Westinghouse Co. v. Bldg. Corp. , 395 Ill. 429 ( 1946 )