 The next day , Larwood fractured wicket @-@ keeper Bert Oldfield 's skull . This occurred when Oldfield mis @-@ hit a hook , which flew from the top edge off a traditional non @-@ bodyline ball ; Oldfield later admitted it was his fault . As a result of the injuries , the costs of insurance cover for players doubled . At the end of the fourth day 's play the Australian Board of Control for Cricket sent the following cable to the MCC in London : 
