Estoppel ; Legione v. Hatley (1983) 152 C.L.R. 406 ; Commonwealth v. Verwayen (1990) 170 C.L.R. 394 ; Jorden v. Money (1854) 5 H.L.C. 185 ; Maddison v. Alderson (1883) 8 App. Cas 467 ; Hoyt's Pty Ltd v. Spencer (1919) 27 C.L.R. 133 ; Maybury v. Atlantic Union Oil Co. Ltd. (1953) 89 C.L.R. 507 ; London Property Trust Ltd. v. High Trees House Ltd. [1947] K.B. 130 ;
Waltons Stores (Interstate) Ltd. v. Maher (1988) 164 C.L.R. 387 ; Antonic v. Walker (1986) 7 N.S.W.L.R. 151 ; Stern v. McArthur (1988) 165 C.L.R. 489 ; Ketteman v. Hansel Properties [1987] A.C. 189 ;