I've got four English dictionaries that mention these different expressions as correct:<br/><br/>Collins (BrE): Judging from and to judge by.<br/><br/>MacMillan (AmE): judging from/by.<br/><br/>Cambridge (AmE): Judging from/by; to judge by/from.<br/><br/>Longman (BrE): judging from.<br/><br/>So?<br/><br/>Sextus