PERRY & CO. (BOW), LTD. v. PORT ISAAC HARBOUR COMMISSIONERS.
                                                                    (1929) 34 Ll L Rep 411
                                                                    COURT OF APPEAL.
                                                                    Before Lord Justice Scrutton, Lord Justice Greer and Lord Justice Russell.
                                                                    
Contract-Erection of breakwaters at Port Isaac Harbour-Tender dependent upon depth of excavation-Provision for excavation down to 30 in.-Work commenced-Subsequent discovery by contractors that further excavation was necessary-Impossibility of performance in way contemplated - Frustration - Rights of parties -